The same issues with https://bugzilla.redhat.com/show_bug.cgi?id=1221068#c2
Verified this bug with OpenShiftEnterpriseErrataRHEL6.7beta/2.1.z/2015-05-21.1, and PASS. # yum install "*openshift*cartridge*" The latest ImageMagick-6.7.2.7-2.el6 would be installed, and all the dependency of cartridge is resolved successfully.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2015-1491.html