Ticket 47828 - fix testcase "import" issue

Description:  An invalid "import" for constants needs to be removed

https://fedorahosted.org/389/ticket/47828

Reviewed by: mreynolds

dirsrvtests/tickets/ticket47828_test.py

@@ -10,7 +10,6 @@ from lib389 import DirSrv, Entry, tools
 from lib389.tools import DirSrvTools
 from lib389._constants import *
 from lib389.properties import *
-from constants import *
 
 log = logging.getLogger(__name__)