dcaegen2 jobs updates for jjb migration

1) Removed dublin branches across all jobs
2) Switched to centos7-docker-8c-8g for docker dependent builds
3) Removed dcaegen2-service clm (subproject has own clm job)
4) Cleaned up old release job (replaced by gerrit-maven jobs)

Change-Id: If77bdf431e0189d774d80b285ec1b0ca98c09d6b
Signed-off-by: Vijay Venkatesh Kumar <vv770d@att.com>
Issue-ID: DCAEGEN2-1669
Issue-ID: DCAEGEN2-1578
Signed-off-by: Vijay Venkatesh Kumar <vv770d@att.com>
diff --git a/jjb/dcaegen2/dcaegen2-services-prh.yaml b/jjb/dcaegen2/dcaegen2-services-prh.yaml
index 7cb2d03..1d4afc4 100644
--- a/jjb/dcaegen2/dcaegen2-services-prh.yaml
+++ b/jjb/dcaegen2/dcaegen2-services-prh.yaml
@@ -7,15 +7,13 @@
       - '{project-name}-{stream}-merge-java'
       - gerrit-maven-stage:
           sign-artifacts: true
-          build-node: centos7-builder-4c-4g
+          build-node: centos7-docker-8c-8g
           maven-versions-plugin: true
 
     project: 'dcaegen2/services/prh'
     stream:
       - 'master':
           branch: 'master'
-      - 'dublin':
-          branch: 'dublin'
     mvn-settings: 'dcaegen2-services-prh-settings'
     files: '**'
     archive-artifacts: ''