GerritClient only retreives Patchsets that belong to a Change from
Gerrit 2.9.1

Change-Id: Ia853131b9debee943ca9fbf3026534ae03eb7633
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=451572
Signed-off-by: Nicholas Folk <Nicholas.folk@tasktop.com>