Revert some should_fail tests to should_pass
Revert some should_fail tests to should_pass

There are tests for vcenter which mark the ostf
test as should_fail. Now ostf tests was fixed and
therefore mark should_fail must be canceled.

See bug description for detail.

Change-Id: Ie7037167bb87ef04cb2427efad7eb78a99055e88
Closes-bug: #1413250

AnselZhangGit/fuel-main,dancn/fuel-main-dev,stackforge/fuel-main,Fiware/ops.Fuel-main-dev,zhaochao/fuel-main,ddepaoli3/fuel-main-dev,dancn/fuel-main-dev,ddepaoli3/fuel-main-dev,AnselZhangGit/fuel-main,teselkin/fuel-main,SergK/fuel-main,SmartInfrastructures/fuel-main-dev,Fiware/ops.Fuel-main-dev,ddepaoli3/fuel-main-dev,dancn/fuel-main-dev,zhaochao/fuel-main,huntxu/fuel-main,Fiware/ops.Fuel-main-dev,Fiware/ops.Fuel-main-dev,teselkin/fuel-main,eayunstack/fuel-main,huntxu/fuel-main,SmartInfrastructures/fuel-main-dev,AnselZhangGit/fuel-main,SergK/fuel-main,eayunstack/fuel-main,huntxu/fuel-main,zhaochao/fuel-main,teselkin/fuel-main,SmartInfrastructures/fuel-main-dev,ddepaoli3/fuel-main-dev,dancn/fuel-main-dev,teselkin/fuel-main,zhaochao/fuel-main,AnselZhangGit/fuel-main,eayunstack/fuel-main,stackforge/fuel-main,SergK/fuel-main,SmartInfrastructures/fuel-main-dev,stackforge/fuel-main,zhaochao/fuel-main