ipaplatform: Use the dirsrv service, not target

IPA only uses one instance of the directory server. When an instance
is not specified to a call to service.start/stop/restart/...,
use IPA's instance.

Stopping a systemd service is synchronous (bby default), but stopping
a target is not. This will change ensures that the directory server
is actually down when stop() finishes.

https://fedorahosted.org/freeipa/ticket/4709

Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipaplatform/base/services.py

@@ -187,8 +187,7 @@ class SystemdService(PlatformService):
         elements = self.systemd_name.split("@")
 
         # Make sure the correct DS instance is returned
-        if (elements[0] == 'dirsrv' and not instance_name and
-            operation == 'is-active'):
+        if elements[0] == 'dirsrv' and not instance_name:
 
             return ('dirsrv@%s.service'
                     % str(self.api.env.realm.replace('.', '-')))