Use a random app name in check_image test
Use a random app name in check_image test

This test starts a build and then exits early, so use
a random app name in case the build is not cleaned up properly
by openshift.

tmckayus/oshinko-s2i,tmckayus/oshinko-s2i,rimolive/oshinko-s2i,rimolive/oshinko-s2i,tmckayus/oshinko-s2i,rimolive/oshinko-s2i