Use yaml syntax instead of key=value syntax consistently

fixes #62

roles/matrix-server/tasks/import/import_postgres.yml

@@ -3,21 +3,25 @@
 # Pre-checks
 
 - name: Fail if playbook called incorrectly
-  fail: msg="The `server_path_postgres_dump` variable needs to be provided to this playbook, via --extra-vars"
+  fail:
+    msg: "The `server_path_postgres_dump` variable needs to be provided to this playbook, via --extra-vars"
   when: "server_path_postgres_dump is not defined or server_path_postgres_dump.startswith('<')"
 
 - name: Check if the provided Postgres dump file exists
-  stat: path="{{ server_path_postgres_dump }}"
+  stat:
+    path: "{{ server_path_postgres_dump }}"
   register: result_server_path_postgres_dump_stat
 
 - name: Fail if provided Postgres dump file doesn't exists
-  fail: msg="File cannot be found on the server at {{ server_path_postgres_dump }}"
+  fail:
+    msg: "File cannot be found on the server at {{ server_path_postgres_dump }}"
   when: not result_server_path_postgres_dump_stat.stat.exists
 
 - import_tasks: tasks/util/detect_existing_postgres_version.yml
 
 - name: Abort, if no existing Postgres version detected
-  fail: msg="Could not find existing Postgres installation"
+  fail:
+    msg: "Could not find existing Postgres installation"
   when: "not matrix_postgres_detected_existing"
 
 
@@ -32,7 +36,10 @@
 # Actual import work
 
 - name: Ensure matrix-postgres is started
-  service: name=matrix-postgres state=started daemon_reload=yes
+  service:
+    name: matrix-postgres
+    state: started
+    daemon_reload: yes
 
 - name: Wait a bit, so that Postgres can start
   wait_for: