Minor - move definition to avoid AttributeError
Minor - move definition to avoid AttributeError

If cluster is None, then AttributeError will be raised. We can avoid
that if we will move conf definition below.

Change-Id: I64cdeebef0ce2822b513df675bdedaf7db46c3e4

tellesnobrega/sahara,zhangjunli177/sahara,openstack/sahara,egafford/sahara,crobby/sahara,crobby/sahara,openstack/sahara,zhangjunli177/sahara,egafford/sahara,ekasitk/sahara,ekasitk/sahara,zhangjunli177/sahara,tellesnobrega/sahara,crobby/sahara,ekasitk/sahara