[postgres] Add synapse db

ansible/roles/postgres/tasks/main.yml

@@ -138,3 +138,16 @@
     state: present
     owner: photoview
   become_user: postgres
+
+- name: synapse user exists
+  postgresql_user:
+    name: synapse
+    password: "{{ synapse_db_pass }}"
+    role_attr_flags: NOSUPERUSER,LOGIN
+
+- name: synapse database exists
+  postgresql_db:
+    name: "synapse"
+    state: present
+    owner: synapse
+  become_user: postgres