Simplify password for additional Postgres databases

Using the result of `password_hash` works for creating them,
but authentication seems to be failing with some tools like pgloader.

It's possible that we're not escaping things properly somewhere.
Ideally, it'd be nice to solve that. But the easier (and still
relatively safe/good) solution is to just turn that password hash
into a UUID that's safe for passing around without worrying about
escaping.

group_vars/matrix_servers

@@ -70,7 +70,7 @@ matrix_appservice_discord_homeserver_token: "{{ matrix_synapse_macaroon_secret_k
 # We only make this use Postgres if our own Postgres server is enabled.
 # It's only then (for now) that we can automatically create the necessary database and user for this service.
 matrix_appservice_discord_database_engine: "{{ 'postgres' if matrix_postgres_enabled else 'sqlite' }}"
-matrix_appservice_discord_database_connString_password: "{{ matrix_synapse_macaroon_secret_key | password_hash('sha512', 'as.discord.db') }}"
+matrix_appservice_discord_database_connString_password: "{{ matrix_synapse_macaroon_secret_key | password_hash('sha512', 'as.discord.db') | to_uuid }}"
 
 ######################################################################
 #
@@ -904,72 +904,72 @@ matrix_postgres_additional_databases: |
     + ([{
       'name': 'matrix_appservice_slack',
       'username': 'matrix_appservice_slack',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'app_slack.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'app_slack.db.secret') | to_uuid,
     }] if matrix_appservice_slack_enabled else [])
     + ([{
       'name': 'matrix_appservice_irc',
       'username': 'matrix_appservice_irc',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'app_irc.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'app_irc.db.secret') | to_uuid,
     }] if matrix_appservice_irc_enabled else [])
     + ([{
       'name': 'mautrix_bridge_facebook',
       'username': 'mautrix_bridge_facebook',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_facebook.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_facebook.db.secret') | to_uuid,
     }] if matrix_mautrix_facebook_enabled else [])
     + ([{
       'name': 'mautrix_bridge_hangouts',
       'username': 'mautrix_bridge_hangouts',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_hangouts.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_hangouts.db.secret') | to_uuid,
     }] if matrix_mautrix_hangouts_enabled else [])
     + ([{
       'name': 'mautrix_bridge_telegram',
       'username': 'mautrix_bridge_telegram',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_telegram.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_telegram.db.secret') | to_uuid,
     }] if matrix_mautrix_telegram_enabled else [])
     + ([{
       'name': 'mautrix_bridge_whatsapp',
       'username': 'mautrix_bridge_whatsapp',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_whatsapp.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mautrix_whatsapp.db.secret') | to_uuid,
     }] if matrix_mautrix_whatsapp_enabled else [])
     + ([{
       'name': 'matrix_bridge_sms',
       'username': 'matrix_bridge_sms',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'bridge_sms.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'bridge_sms.db.secret') | to_uuid,
     }] if matrix_sms_bridge_enabled else [])
     + ([{
       'name': 'matrix_puppet_skype',
       'username': 'matrix_puppet_skype',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_skype.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_skype.db.secret') | to_uuid,
     }] if matrix_mx_puppet_skype_enabled else [])
     + ([{
       'name': 'matrix_puppet_slack',
       'username': 'matrix_puppet_slack',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_slack.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_slack.db.secret') | to_uuid,
     }] if matrix_mx_puppet_slack_enabled else [])
     + ([{
       'name': 'matrix_puppet_twitter',
       'username': 'matrix_puppet_twitter',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_twitter.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_twitter.db.secret') | to_uuid,
     }] if matrix_mx_puppet_twitter_enabled else [])
     + ([{
       'name': 'matrix_puppet_instagram',
       'username': 'matrix_puppet_instagram',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_insta.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_insta.db.secret') | to_uuid,
     }] if matrix_mx_puppet_instagram_enabled else [])
     + ([{
       'name': 'matrix_puppet_discord',
       'username': 'matrix_puppet_discord',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_puppet.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_puppet.db.secret') | to_uuid,
     }] if matrix_mx_puppet_discord_enabled else [])
     + ([{
       'name': 'matrix_puppet_steam',
       'username': 'matrix_puppet_steam',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_steam.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mx_steam.db.secret') | to_uuid,
     }] if matrix_mx_puppet_steam_enabled else [])
     + ([{
       'name': 'matrix_dimension',
       'username': 'matrix_dimension',
-      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'dimension.db.secret') | string,
+      'password': matrix_synapse_macaroon_secret_key | password_hash('sha512', 'dimension.db.secret') | to_uuid,
     }] if matrix_dimension_enabled else [])
   }}