ONAP: Improve jenkins rebase and push-upstream jobs

- Mirror all branches from ONAP upstream to Nordix Gerrit.
- Fix corrupt zip file problem when pushing to ONAP upstream.
- Cache the git repository on the Jenkins slave nodes
  when rebasing repositories.
- Make sure the commit hash in the local repo is the same
  as in Nordix Gerrit and the same as the commit hash
  in the upstream ONAP gerrit.
- Update ONAP push upstream job to preserve git topics.
- Decrease number of jobs required for ONAP project in Jenkins.

Change-Id: I11973774eaf92d91ccf44a8f659be994fe5e5e69
diff --git a/jjb/onap/dcaegen2-services-pm-mapper/dcaegen2-services-pm-mapper-push-upstream-jobs.yaml b/jjb/onap/dcaegen2-services-pm-mapper/dcaegen2-services-pm-mapper-push-upstream-jobs.yaml
index 227a935..0e226ae 100644
--- a/jjb/onap/dcaegen2-services-pm-mapper/dcaegen2-services-pm-mapper-push-upstream-jobs.yaml
+++ b/jjb/onap/dcaegen2-services-pm-mapper/dcaegen2-services-pm-mapper-push-upstream-jobs.yaml
@@ -23,11 +23,5 @@
     project: dcaegen2/services/pm-mapper
     project-name: dcaegen2-services-pm-mapper
 
-    stream:
-      - master:
-          branch: '{stream}'
-      - dublin:
-          branch: '{stream}'
-
     jobs:
-      - 'onap-{project-name}-{stream}-push-upstream'
+      - 'onap-{project-name}-push-upstream'