Merge branch 'stable-3.4' into stable-3.5

* stable-3.4:
  Return empty list when prefix is not matched in suggest
  Add metric to count when ref size is larger that maxApiPayloadSize
  Improve fetch logging by adding replication task id and refs list
  Change the base docker image in the broker topology.
  Update docker http/broker topologies.
  Pull-replication does not require DELETE refs permissions.

Adjusted Gerrit version in Dockerfile

Change-Id: Ic2350cba90027b7d648475f968eb1e355934ab3d