openshift.ks: Only modify ssl.conf if applicable

configure_hosts: Only modify /etc/htttpd/conf.d/ssl.conf if we are
installing the broker or node components.

This commit fixes bug 1069463.
Merge pull request #305 from Miciah/bug-1069463-openshift.ks-only-modify-ssl.conf-if-applicable

openshift.ks: Only modify ssl.conf if applicable