Fix asserts in TestRoles.test_roles_add_and_remove
Fix asserts in TestRoles.test_roles_add_and_remove

Used assertItemsEqual instead of assertEqual so it will not
fail when order change.

Change-Id: I5fb2c6325ac668e98a171b5dab44ea08eb1430b0
Closes-Bug: #1472592

huntxu/fuel-web,stackforge/fuel-web,prmtl/fuel-web,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,SmartInfrastructures/fuel-web-dev,stackforge/fuel-web,huntxu/fuel-web,eayunstack/fuel-web,prmtl/fuel-web,huntxu/fuel-web,huntxu/fuel-web,stackforge/fuel-web,eayunstack/fuel-web,prmtl/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,eayunstack/fuel-web,SmartInfrastructures/fuel-web-dev,prmtl/fuel-web,huntxu/fuel-web,prmtl/fuel-web