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

09fa3ce Added check for Alerta admin API key generation
984c82e Add keystone credentials key backup-restore steps
05c4983 Add check for galera clustercheck password presence
cff0741 Adding OS db cleanup job pipeline

Change-Id: I9248cbc476dcd69880f9252733d45d9a9f42d829