SUSE: Refresh zypper repositories if necessary

When we change the status of the repositories it's best if we refresh
the metadata in order to ensure that everything is in a sensible state.
Moreover, we shouldn't autorefresh the 'repo-oss' repository since it's
frozen right after the openSUSE release.

Change-Id: I1ca13d85f8a275ff93c8c12fab1833dc2e50f6fb

tasks/openstack_hosts_configure_zypper.yml

@@ -79,3 +79,9 @@
   until: _adding_repo | success
   retries: 5
   delay: 2
+
+- name: Refresh repositories if necessary
+  zypper_repository:
+    repo: '*'
+    runrefresh: yes
+  when: _adding_repo | changed

vars/suse-42.yml

@@ -99,9 +99,12 @@ _package_repos:
   - name: "repo-oss"
     repo: "{{ opensuse_repo_oss_url }}"
     auto_import_keys: yes
+    autorefresh: no
   - name: "repo-update"
     repo: "{{ opensuse_repo_update_url }}"
     auto_import_keys: yes
+    autorefresh: yes
   - name: "OBS:Cloud:OpenStack:Pike"
     repo: "{{ opensuse_obs_cloud_repo_url }}"
     auto_import_keys: yes
+    autorefresh: yes