replica install: do not set CA renewal master flag
The CA renewal master flag was uncoditionally set on every replica during
replica install. This causes the Dogtag certificates initially shared
among all replicas to differ after renewal.
Do not set the CA renewal master flag in replica install anymore. On
upgrade, remove the flag from all but one IPA masters.
https://fedorahosted.org/freeipa/ticket/5902
Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>