Removing kollaglue/centos-rdo-zaqar from excluded_images

Now kollaglue/centos-rdo-zaqar is building sucesfully,
therefore we shoudn't exclude it.

Change-Id: I873529c205786b3d9f410374f0dc6410dadcbdc4
Closes-Bug: #1470348

tests/test_images.py

@@ -40,7 +40,6 @@ class ImagesTest(base.BaseTestCase):
                            "kollaglue/centos-rdo-swift-proxy-server",
                            "kollaglue/centos-rdo-swift-container",
                            "kollaglue/centos-rdo-swift-account",
-                           "kollaglue/centos-rdo-zaqar",
                            "kollaglue/centos-rdo-rhel-osp-base"]
 
         results = eval(line)