fix unit tests in concurrency several spawned threads were not labelled
fix unit tests in concurrency
several spawned threads were not labelled

nicolas-p/factor,factor/factor,tgunr/factor,bjourne/factor,littledan/Factor,sarvex/factor-lang,mcandre/factor,AlexIljin/factor,cataska/factor,nicolas-p/factor,erg/factor,dharmatech/factor,sarvex/factor-lang,mcandre/factor,mrjbq7/factor,bpollack/factor,factor/factor,slavapestov/factor,seckar/factor,kingcons/factor,bjourne/factor,cataska/factor,kingcons/factor,bpollack/factor,sarvex/factor-lang,AlexIljin/factor,mcandre/factor,nicolas-p/factor,dharmatech/factor,factor/factor,dch/factor,littledan/Factor,nicolas-p/factor,bjourne/factor,Keyholder/factor,AlexIljin/factor,erg/factor,jwmerrill/factor,cataska/factor,sarvex/factor-lang,jwmerrill/factor,AlexIljin/factor,slavapestov/factor,AlexIljin/factor,ehird/factor,dch/factor,slavapestov/factor,dch/factor,bpollack/factor,dharmatech/factor,Keyholder/factor,sarvex/factor-lang,mrjbq7/factor,slavapestov/factor,bjourne/factor,ceninan/factor,slavapestov/factor,dch/factor,mrjbq7/factor,kingcons/factor,seckar/factor,mcandre/factor,mrjbq7/factor,nicolas-p/factor,factor/factor,erg/factor,nicolas-p/factor,ehird/factor,sarvex/factor-lang,ceninan/factor,ceninan/factor,bpollack/factor,bpollack/factor,mcandre/factor,tgunr/factor,tgunr/factor,mcandre/factor,littledan/Factor,sarvex/factor-lang,bpollack/factor,factor/factor,Keyholder/factor,AlexIljin/factor,factor/factor,cataska/factor,ehird/factor,bjourne/factor,littledan/Factor,nicolas-p/factor,bjourne/factor,slavapestov/factor,seckar/factor,tgunr/factor,kingcons/factor,erg/factor,erg/factor,tgunr/factor,mcandre/factor,bpollack/factor,AlexIljin/factor,erg/factor,slavapestov/factor,erg/factor,mrjbq7/factor,dch/factor,jwmerrill/factor,dch/factor,bjourne/factor,tgunr/factor,ceninan/factor,mrjbq7/factor