Ensure yum cache is ready before update

To workaround yum bug with libnss we need to make yum cache
before running update. In fact we should have done this
regardless of the bug.

Change-Id: I5b2355fb8abe3c8d4b9ce9c62b9ffdba8c1e8d9d
Resolves: rhbz#1458841
Closes-Bug: #1703830
(cherry picked from commit 1a544f66a5)
(cherry picked from commit 7d5929f5ba)

extraconfig/tasks/pacemaker_common_functions.sh

@@ -301,6 +301,8 @@ function systemctl_swift {
 # Special-case OVS for https://bugs.launchpad.net/tripleo/+bug/1635205
 # Update condition and add --notriggerun for +bug/1669714
 function special_case_ovs_upgrade_if_needed {
+    # Always ensure yum has full cache
+    yum makecache || echo "Yum makecache failed. This can cause failure later on."
     if rpm -qa | grep "^openvswitch-2.5.0-14" || rpm -q --scripts openvswitch | awk '/postuninstall/,/*/' | grep "systemctl.*try-restart" ; then
         echo "Manual upgrade of openvswitch - ovs-2.5.0-14 or restart in postun detected"
         rm -rf OVS_UPGRADE

extraconfig/tasks/yum_update.sh

@@ -44,6 +44,9 @@ fi
 
 command_arguments=${command_arguments:-}
 
+# Always ensure yum has full cache
+yum makecache || echo "Yum makecache failed. This can cause failure later on."
+
 # yum check-update exits 100 if updates are available
 set +e
 check_update=$(yum check-update 2>&1)