server install: do not restart httpd during CA install

At this point, httpd is not configured and the restart fails.

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

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

ipaserver/install/ca.py

@@ -245,8 +245,9 @@ def install_step_1(standalone, replica_config, options):
 
     ca.start('pki-tomcat')
 
-    # We need to restart apache as we drop a new config file in there
-    services.knownservices.httpd.restart(capture_output=True)
+    if standalone or replica_config is not None:
+        # We need to restart apache as we drop a new config file in there
+        services.knownservices.httpd.restart(capture_output=True)
 
     if standalone:
         # Install CA DNS records