add missing ratelimiting options required for load testing

roles/matrix-synapse/defaults/main.yml

@@ -111,6 +111,18 @@ matrix_synapse_rc_login:
     per_second: 0.17
     burst_count: 3
 
+matrix_synapse_rc_admin_redaction:
+  per_second: 1
+  burst_count: 50
+
+matrix_synapse_rc_joins:
+  local:
+    per_second: 0.1
+    burst_count: 3
+  remote:
+    per_second: 0.01
+    burst_count: 3
+
 matrix_synapse_rc_federation:
   window_size: 1000
   sleep_limit: 10

roles/matrix-synapse/templates/synapse/homeserver.yaml.j2

@@ -772,6 +772,7 @@ rc_login: {{ matrix_synapse_rc_login|to_json }}
 #rc_admin_redaction:
 #  per_second: 1
 #  burst_count: 50
+rc_admin_redaction: {{ matrix_synapse_rc_admin_redaction|to_json }}
 #
 #rc_joins:
 #  local:
@@ -780,7 +781,7 @@ rc_login: {{ matrix_synapse_rc_login|to_json }}
 #  remote:
 #    per_second: 0.01
 #    burst_count: 3
-
+rc_joins: {{ matrix_synapse_rc_joins|to_json }}
 
 # Ratelimiting settings for incoming federation
 #