oo-accept-broker: fix and enable SELinux checks

check_selinux_booleans was added with the initial revision of
oo-accept-broker, but it was never enabled or updated.  This commit
updates it to check the appropriate Boolean values.  This commit also
uncomments the invocation of this function so that the checks will run.
Merge pull request #1264 from Miciah/fix-and-enable-selinux-checks

Merged by openshift-bot