replica install: use one remote CA host name everywhere

Remote master and CA host names may differ. Always use the remote CA host
name and never the remote master host name in CA replica install.

https://fedorahosted.org/freeipa/ticket/6392

Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>

install/tools/ipa-ca-install

@@ -138,7 +138,7 @@ def install_replica(safe_options, options, filename):
 
     if options.promote:
         config = ReplicaConfig()
-        config.master_host_name = None
+        config.ca_host_name = None
         config.realm_name = api.env.realm
         config.host_name = api.env.host
         config.domain_name = api.env.domain
@@ -149,6 +149,7 @@ def install_replica(safe_options, options, filename):
         cafile = paths.IPA_CA_CRT
     else:
         config = create_replica_config(dirman_password, filename, options)
+        config.ca_host_name = config.master_host_name
         cafile = config.dir + '/ca.crt'
 
     global REPLICA_INFO_TOP_DIR
@@ -159,12 +160,9 @@ def install_replica(safe_options, options, filename):
         attrs = api.Backend.ldap2.get_ipa_config()
         config.subject_base = attrs.get('ipacertificatesubjectbase')[0]
 
-    if config.master_host_name is None:
+    if config.ca_host_name is None:
         config.ca_host_name = \
             service.find_providing_server('CA', api.Backend.ldap2, api.env.ca_host)
-        config.master_host_name = config.ca_host_name
-    else:
-        config.ca_host_name = config.master_host_name
 
     options.realm_name = config.realm_name
     options.domain_name = config.domain_name