Added retries to the docker pulls

roles/matrix-bridge-sms/tasks/setup_install.yml

@@ -4,6 +4,10 @@
   docker_image:
     name: "{{ matrix_sms_bridge_docker_image }}"
     source: "{{ 'pull' if ansible_version.major > 2 or ansible_version.minor > 7 else omit }}"
+  register: result
+  retries: "{{ matrix_container_retries_count }}"
+  delay: "{{ matrix_container_retries_delay }}"
+  until: result is not failed
 
 - name: Ensure matrix-sms-bridge paths exist
   file: