Correct reraising of exception
Correct reraising of exception

when an exception was caught and rethrown, it should call 'raise'
without any arguments.

Change-Id: Id5a59471229b2314c337d6a7998b3a05776e9f57

openstack/tacker,stackforge/tacker,zeinsteinz/tacker,stackforge/tacker,priya-pp/Tacker,openstack/tacker,trozet/tacker,openstack/tacker,priya-pp/Tacker,zeinsteinz/tacker,trozet/tacker