refactor(carousel): modify slide tests a bit
refactor(carousel): modify slide tests a bit

Closes #4748

icfantv/bootstrap,wesleycho/bootstrap,shootermv/bootstrap,justin-john/bootstrap-1,Lincoln-xzc/angular-ui-bootstrap,Servoy/bootstrap,infowrap/bootstrap,deeg/bootstrap,angular-ui/bootstrap,davious/angular-ui-bootstrap,benhalverson/bootstrap,davious/angular-ui-bootstrap,looker/bootstrap,byronigoe/bootstrap,justin-john/bootstrap-1,benhalverson/bootstrap,RobJacobs/bootstrap,shiftagent/ui-bootstrap,burlhock/bootstrap,BookingBug/bootstrap,fpipita/bootstrap,looker/bootstrap,matteopic/bootstrap,connyay/bootstrap,Lincoln-xzc/angular-ui-bootstrap,wesleycho/bootstrap,caoruiy/bootstrap,Servoy/bootstrap,matteopic/bootstrap,fpipita/bootstrap,caoruiy/bootstrap,mabi/bootstrap,vfiles/bootstrap,pdsoftplan/bootstrap,shiftagent/ui-bootstrap,deeg/bootstrap,christor/bootstrap,christor/bootstrap,vfiles/bootstrap,connyay/bootstrap,mabi/bootstrap,benhalverson/bootstrap,burlhock/bootstrap,Kpler/bootstrap,292388900/bootstrap,RobJacobs/bootstrap,Foxandxss/bootstrap,byronigoe/bootstrap,infowrap/bootstrap,pdsoftplan/bootstrap,Foxandxss/bootstrap,angular-ui/bootstrap,292388900/bootstrap,shootermv/bootstrap,Kpler/bootstrap,benhalverson/bootstrap,icfantv/bootstrap,BookingBug/bootstrap