Fix CA topology warning
Commit 7284097eedef70dd556270732e6ab8e23501ce09 kept
find_providing_servers('CA') call before enable_services(). Therefore the
list of known CA servers did not contain the current replica.
ipa-replica-install on the first replica with --setup-ca still printed
the CA topology warning.
See: https://pagure.io/freeipa/issue/7566
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>