Fix usecase tag evaluation
Fix usecase tag evaluation

tag evaluation in usecase coverage shouldn't remember previous state

pombreda/fMBT,mixu-/fMBT,yoonkiss/fMBT,01org/fMBT,pombreda/fMBT,mlq/fMBT,mixu-/fMBT,mlq/fMBT,mlq/fMBT,pombreda/fMBT,mixu-/fMBT,mixu-/fMBT,violep01/fMBT,giantpinkwalrus/fMBT,yoonkiss/fMBT,acozzette/fMBT,rseymour/fMBT,mlq/fMBT,giantpinkwalrus/fMBT,heivi/fMBT,giantpinkwalrus/fMBT,pombreda/fMBT,01org/fMBT,acozzette/fMBT,rseymour/fMBT,giantpinkwalrus/fMBT,rseymour/fMBT,pombreda/fMBT,heivi/fMBT,mlq/fMBT,pombreda/fMBT,rseymour/fMBT,rseymour/fMBT,heivi/fMBT,01org/fMBT,rseymour/fMBT,rseymour/fMBT,yoonkiss/fMBT,acozzette/fMBT,heivi/fMBT,violep01/fMBT,acozzette/fMBT,heivi/fMBT,pombreda/fMBT,yoonkiss/fMBT,mixu-/fMBT,01org/fMBT,violep01/fMBT,giantpinkwalrus/fMBT,01org/fMBT,yoonkiss/fMBT,violep01/fMBT,mlq/fMBT,heivi/fMBT,mlq/fMBT,acozzette/fMBT,heivi/fMBT,violep01/fMBT