Apply suggestions from code review

Co-authored-by: Slavi Pantaleev <slavi@devture.com>

roles/custom/matrix-bot-draupnir/defaults/main.yml

@@ -118,11 +118,11 @@ matrix_bot_draupnir_config_rawHomeserverUrl: ""  # noqa var-naming
 matrix_bot_draupnir_config_disableServerACL: false  # noqa var-naming
 
 # Used to control if the Synapse Admin API is exposed internally to the containers and therefore giving Draupnir Access.
-matrix_bot_draupnir_admin_api_enabled: ""
+matrix_bot_draupnir_admin_api_enabled: false
 
 # Controls if the draupnir room hijack command is activated or not. This also automatically enables the internal admin API
 # in the process of activation.
-matrix_bot_draupnir_room_hijack_enabled: "false"
+matrix_bot_draupnir_room_hijack_enabled: false
 
 # Controls if the room state backing store is activated.
 # Room state backing store makes restarts of the bot lightning fast as the bot does not suffer from amnesia.