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

6e659e6a Update docker images
d8e96c38 Pin cvp-sanity-tests image PROD-37264
8af8e18a Bump gerrit image tag
a8f761b9 Follow up jenkins version update

Change-Id: I7fc89ee6c4a8b9d9a948f8f462ffee53d22217cb