Check if IPA is configured before attempting a winsync migration

https://fedorahosted.org/freeipa/ticket/5470

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

ipaserver/install/ipa_winsync_migrate.py

@@ -29,7 +29,7 @@ from ipapython.dn import DN
 from ipapython.ipautil import realm_to_suffix, posixify
 from ipapython.ipa_log_manager import log_mgr
 from ipaserver.plugins.ldap2 import ldap2
-from ipaserver.install import replication
+from ipaserver.install import replication, installutils
 
 if six.PY3:
     unicode = str
@@ -340,6 +340,12 @@ class WinsyncMigrate(admintool.AdminTool):
         the plumbing.
         """
 
+        # Check if the IPA server is configured before attempting to migrate
+        try:
+            installutils.check_server_configuration()
+        except RuntimeError as e:
+            sys.exit(e)
+
         # Finalize API
         api.bootstrap(in_server=True, context='server')
         api.finalize()