Fix test_webservice.py for py35
Fix test_webservice.py for py35

Minor compatibility fix so test_webservice.py works
under python 3.5

Change-Id: I79367d698fca19dfbbb57fcc6a94d7f688904d30

openstack/congress,ramineni/my_congress,ramineni/my_congress,ramineni/my_congress,ramineni/my_congress,openstack/congress