Allow the matrix user username and groupname to be configured separately

No migration steps should be required.

roles/matrix-postgres/tasks/import_sqlite_db.yml

@@ -50,7 +50,7 @@
     state: directory
     mode: 0700
     owner: "{{ matrix_user_username }}"
-    group: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
 
 - name: Ensure matrix-postgres is started
   service:

roles/matrix-postgres/tasks/migrate_postgres_data_directory.yml

@@ -46,7 +46,7 @@
     state: directory
     mode: 0700
     owner: "{{ matrix_user_username }}"
-    group: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
   when: "result_pg_old_data_dir_stat.stat.exists"
 
 - block:

roles/matrix-postgres/tasks/run_synapse_janitor.yml

@@ -42,7 +42,7 @@
     force: true
     mode: 0550
     owner: "{{ matrix_user_username }}"
-    group: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
 
 - name: Ensure matrix-postgres is started
   service:

roles/matrix-postgres/tasks/setup_postgres.yml

@@ -38,7 +38,7 @@
     state: directory
     mode: 0700
     owner: "{{ matrix_user_username }}"
-    group: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
   with_items:
     - "{{ matrix_postgres_base_path }}"
     - "{{ matrix_postgres_data_path }}"
@@ -52,7 +52,7 @@
     path: "{{ matrix_postgres_data_path }}"
     state: directory
     owner: "{{ matrix_user_username }}"
-    group: "{{ matrix_user_username }}"
+    group: "{{ matrix_user_groupname }}"
     recurse: yes
   when: matrix_postgres_enabled|bool