semanage is part of "policycoreutils-python" package, but mariadb55 meta package depend on "policycoreutils", so semanage is not installed and SELinux context is not restored properly in scl root. I haven't checked other database packages, maybe there's the same problem.
Thanks for reporting, will fix for Beta.
rhel6: https://tcms.engineering.redhat.com/run/123162/#caserun_4597699 rhel6.3.z: https://tcms.engineering.redhat.com/run/123163/#caserun_4597807 rhel6.4.z: https://tcms.engineering.redhat.com/run/123164/#caserun_4597915 rhel7: https://tcms.engineering.redhat.com/run/123165/#caserun_4598023 VERIFIED.
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. http://rhn.redhat.com/errata/RHBA-2014-0614.html