Change policy/engine build node to docker

The policy/engine is being changed to use docker-maven-plugin to
build docker images and so they always need to be built on a docker node.

Changed the merge and release to support docker. These
may fail until we get the below review in:
https://gerrit.onap.org/r/#/c/policy/engine/+/90025/

Issue-ID: POLICY-969
Signed-off-by: Rashmi Pujar <rashmi.pujar@bell.ca>
Change-Id: Iaed6bfe09a8d64cca3847990bbaf30909fb19d77
1 file changed