openshift.ks: Run restorecon on /etc/openshift

Run restorecon -rv /etc/openshift at the end of configure_openshift.

Delete /etc/openshift/node.conf from a restorecon command in
configure_selinux_policy_on_node because the previous change
will take care of /etc/openshift/node.conf.

This commit fixes bug 1110424.
Merge pull request #386 from Miciah/bug-1110424-restorecon-etc-openshift

 openshift.ks: Run restorecon on /etc/openshift