JJB cleanups for VOLTHA.

Misc/
  o yaml lint clenaups
  o Remove prototype voltha-2.{9,10,11} job placeholders.
  o Replace mainatiner email address (Matteo) with build system group.

Change-Id: I37e1175f56042632753b75c849dbaf07f74bd284
diff --git a/jjb/verify/xos.yaml b/jjb/verify/xos.yaml
index 889eae7..afc6ee1 100644
--- a/jjb/verify/xos.yaml
+++ b/jjb/verify/xos.yaml
@@ -44,7 +44,7 @@
           pypi-index: 'pypi'
           dependency-jobs: 'version-tag_wildcard'
       - 'docker-publish':
-          maintainers: "teo@opennetworking.org, andy@opennetworking.org, scottb@opennetworking.org"
+          maintainers: "onf-bat-admin@opennetworking.org, andy@opennetworking.org, scottb@opennetworking.org"
           build-timeout: 30
           docker-repo: 'xosproject'
           dependency-jobs: 'version-tag_wildcard'