copr-fe: consume the messages as non-root user

And consolidate the two service drop-in config files.

Fixes: https://pagure.io/copr/copr/issue/2036

roles/copr/frontend/files/systemd/system/fm-consumer@copr_messaging.service.d/50-copr.conf

@@ -1,2 +1,11 @@
 [Service]
+# We still need to move Frontend code to default system paths.
 Environment=PYTHONPATH=/usr/share/copr/coprs_frontend
+
+# When the service is killed or failed, start it again
+Restart = on-failure
+RestartSec = 5s
+
+# The default fedora messaging service file runs under root
+User=copr-fe
+Group=copr-fe

roles/copr/frontend/files/systemd/system/fm-consumer@copr_messaging.service.d/50-restart.conf

@@ -1,4 +0,0 @@
-# When the service is killed or failed, start it again
-[Service]
-Restart = on-failure
-RestartSec = 5s

roles/copr/frontend/tasks/main.yml

@@ -176,7 +176,6 @@
 - name: start fm-consumer service
   service: state=started enabled=yes name="fm-consumer@copr_messaging"
   when:
-  - ansible_facts.packages['copr-frontend'][0].version is version('1.156', '>=')
   - not services_disabled|bool
 
 - name: install bash_profile file to ease some admin tasks