copr-be: invent copr_backend_target

.. temporarily, till copr-be and copr-be-dev aren't synced on the
updated version of copr-backend package.

inventory/group_vars/copr_back_aws

@@ -66,3 +66,6 @@ nagios_Check_Services:
   swap: false
 
 # There is no python2 on F30
+
+# what is the main backend service name
+copr_backend_target: copr-backend.service

inventory/group_vars/copr_back_dev_aws

@@ -63,3 +63,6 @@ copr_hostbase: copr-be-dev
 _copr_be_conf: copr-be.conf-dev
 
 datacenter: aws
+
+# what is the main backend service name
+copr_backend_target: copr-backend.target

roles/copr/backend/handlers/main.yml

@@ -2,7 +2,7 @@
   file: path=/etc/lighttpd/copr-be.fedoraproject.org.pem owner=root group=root mode=0600
 
 - name: restart copr-backend
-  service: name=copr-backend state=restarted
+  service: name="{{ copr_backend_target }} state=restarted
   when: not services_disabled
 
 - name: systemctl daemon-reload

roles/copr/backend/tasks/main.yml

@@ -274,7 +274,7 @@
   when: not services_disabled|bool
   with_items:
   - redis       # TODO: .service in copr-backend should depend on redis
-  - copr-backend
+  - "{{ copr_backend_target }}"
 
 - name: install aws cleaning script
   copy: src="cleanup-vms-aws" dest=/usr/local/bin/ mode=755