Make matrix-synapse role respect matrix_synapse_enabled flag

roles/matrix-synapse/tasks/synapse/setup_uninstall.yml

@@ -0,0 +1,28 @@
+- name: Check existence of matrix-synapse service
+  stat:
+    path: "/etc/systemd/system/matrix-synapse.service"
+  register: matrix_synapse_service_stat
+
+- name: Ensure matrix-synapse is stopped
+  service:
+    name: matrix-synapse
+    state: stopped
+    daemon_reload: yes
+  register: stopping_result
+  when: "matrix_synapse_service_stat.stat.exists"
+
+- name: Ensure matrix-synapse.service doesn't exist
+  file:
+    path: "/etc/systemd/system/matrix-synapse.service"
+    state: absent
+  when: "matrix_synapse_service_stat.stat.exists"
+
+- name: Ensure systemd reloaded after matrix-synapse.service removal
+  service:
+    daemon_reload: yes
+  when: "matrix_synapse_service_stat.stat.exists"
+
+- name: Ensure Synapse Docker image doesn't exist
+  docker_image:
+    name: "{{ matrix_synapse_docker_image }}"
+    state: absent