Update to Gerrit 2.9 API and use Java 7
Update to Gerrit 2.9 API and use Java 7

Change-Id: Ic524a15331da7d938080f1a436e25c4746563933
Signed-off-by: Edwin Kempin <b444e279ad95fdef4fbdd82c813b624595df204a@sap.com>

GerritCodeReview/plugins_hooks-bugzilla,GerritCodeReview/plugins_its-phabricator,GerritCodeReview/plugins_its-phabricator