openshift.ks: Fix logic in configure_rhn_channels

Fix a syntax error in configure_rhn_channels that would cause it to fail to
enable the infrastructure repository in the situation where we are
installing the host as neither a broker nor a node (i.e., if we are
installing only ActiveMQ, MongoDB, or BIND).

This commit fixes bug 1056895.
openshift.ks: Don't update DOMAIN_SUFFIX

The DOMAIN_SUFFIX setting in /etc/openshift/console.conf no longer exists,
so don't bother trying to update it.

This commit fixes bug 1056897.
Merge pull request #275 from Miciah/openshift.ks-fix-configure_rhn_channels

openshift.ks: Fix logic in configure_rhn_channels
bug 1056895 marked verified.
Merge pull request #276 from Miciah/openshift.ks-dont-update-DOMAIN_SUFFIX

openshift.ks: Don't update DOMAIN_SUFFIX
bug 1056897 marked VERIFIED