changed: reduced default connection limit to 15

Reduced default connection limit to the pleroma database to 15.
This parameter is now configurable.

defaults/main.yml

@@ -16,6 +16,7 @@ pleroma_defaults:
     db:
       name: pleroma_db
       user: pleroma
+      connLimit: 15
   postgresServer:
     pg_hba:
     - type: local

tasks/postgres.yml

@@ -81,7 +81,7 @@
 - name: Postgres -- Ensuring that the database {{ pleroma.config.db.name }} exists.
   become_user: postgres
   postgresql_db:
-    conn_limit: "20"
+    conn_limit: "{{ pleroma.config.db.connLimit }}"
     encoding: UTF-8
     login_unix_socket: "{{ pleroma_postgres_unix_socket_dir }}"
     name: "{{ pleroma.config.db.name }}"