Merge the tip of origin/release/proposed/2019.2.0 into origin/release/2019.2.0

640b73e Add PROD-37068 upgrade check
68b37b5 Adjust ceph pre-upgrade-checks in case ceph is not deployed
452aabf [mk][gerrit] Include commit-message

Change-Id: I35f00acc4cd5ee7eeef374a8afa872ebaf6ce32d