Copr upgrade: don't stop httpd unless packages were actually upgraded

playbooks/manual/upgrade/copr.yml

@@ -3,9 +3,11 @@
   tasks:
   - name: clean dnf metadata
     command: dnf clean all
+    args:
       warn: False
   - name: create dnf metadata cache
     command: dnf makecache
+    args:
       warn: False
   - name: lits installed copr packages
     dnf:
@@ -20,11 +22,13 @@
     with_items: "{{ copr_packages.results }}"
   - name: stop httpd
     service: name="httpd" state=stopped
+    when: copr_upgrade.changed
   - name: run db migration
     become: yes
     become_user: copr-fe
     command: alembic-3 upgrade head
     args:
       chdir: /usr/share/copr/coprs_frontend/
+    when: copr_upgrade.changed
   - name: start httpd
     service: name="httpd" state=started