Use the '-p' non-interactive option to generate password hash instead of 'expect'

roles/matrix-synapse/tasks/setup_synapse_main.yml

@@ -79,9 +79,3 @@
     dest: "/usr/local/bin/matrix-synapse-register-user"
     mode: 0750
 
-- name: Ensure matrix-synapse-generate-password-hash script created
-  template:
-    src: "{{ role_path }}/templates/synapse/usr-local-bin/matrix-synapse-generate-password-hash.j2"
-    dest: "/usr/local/bin/matrix-synapse-generate-password-hash"
-    mode: 0750
-

roles/matrix-synapse/tasks/update_user_password.yml

@@ -41,7 +41,7 @@
   when: postgres_start_result.changed
 
 - name: Generate password hash
-  shell: "/usr/local/bin/matrix-synapse-generate-password-hash {{ password }}"
+  shell: "/usr/bin/docker exec matrix-synapse /usr/local/bin/hash_password -c /data/homeserver.yaml -p {{ password }}"
   register: password_hash
 
 - name: Update user password hash