install: custom selinux module for mmopenshift

https://bugzilla.redhat.com/show_bug.cgi?id=1117360

If selinux-policy is not sufficiently updated, install an SELinux policy
module to enable rsyslog7-mmopenshift if needed per bug 1096155.
Merge pull request #398 from sosiouxme/enterprise-2.1-logging

install: custom selinux module for mmopenshift