Migrate gerrit-maven-stage (DCAEGEN)-3

Migrate to use gerrit-maven-stage from
global-jjb to allow the generation of
signed release artifacts that will reduce
release processing time.
Do not sign artifacts in maven-docker-stage as
there are no jars being process in these jobs.

Change-Id: I0f5d5c253df9fb48db0a1a2dd5d05ae8b36025b5
Issue-ID: CIMAN-234
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
7 files changed