ipa-kra-install: exit if ca_host is overriden
ipa-kra-install should exit if ca_host line is present
in /etc/ipa/default.conf, as it may lead to a misconfigured
setup.
Fixes: https://pagure.io/freeipa/issue/8245
Signed-off-by: Antonio Torres <antorres@redhat.com>
Reviewed-By: François Cami <fcami@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>