ACUMOS: Improve jenkins jobs for Acumos projects

- Mirror branches from Acumos upstream project to Nordix.
- Do not force the git user.name to be the gerrit id.
  Git authorship can be independent from the
  gerrit review ownership now.
- Cache the 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 gerrit.
- Decrease number of jobs required for project in Jenkins

Change-Id: I29ea8b9b2573b5d894246f47b537aeb61027f6f8
diff --git a/jjb/acumos/acumos-java-client/acumos-java-client-push-upstream-jobs.yml b/jjb/acumos/acumos-java-client/acumos-java-client-push-upstream-jobs.yml
index 36b9c03..297cfae 100644
--- a/jjb/acumos/acumos-java-client/acumos-java-client-push-upstream-jobs.yml
+++ b/jjb/acumos/acumos-java-client/acumos-java-client-push-upstream-jobs.yml
@@ -21,9 +21,6 @@
     name: acumos-java-client-push-upstream
     project: acumos-java-client
     project-name: acumos-java-client
-    stream:
-      - master:
-          branch: '{stream}'
 
     jobs:
-      - 'acumos-{project-name}-{stream}-push-upstream'
+      - 'acumos-{project-name}-push-upstream'