create test for retrieving different reviews pushed with the same
changeId (previously fixed bug)

Change-Id: I1d5aadaea0d5762522ba54b8f8a681d5ed4a4d3d
Task-Url: https://bugs.eclipse.org/bugs/show_bug.cgi?id=451572
Signed-off-by: Nicholas Folk <Nicholas.folk@tasktop.com>