parallel tests: use harcoded 2 threads
parallel tests: use harcoded 2 threads

not much improvement was observed otherwise.

jcasner/nupic,pulinagrawal/nupic,virneo/nupic,alfonsokim/nupic,allanino/nupic,wanghaven/nupic,fergalbyrne/nupic,darshanthaker/nupic,runt18/nupic,virneo/nupic,wanghaven/nupic,EricSB/nupic,cngo-github/nupic,elkingtonmcb/nupic,sambitgaan/nupic,metaml/nupic,breznak/nupic,mcanthony/nupic,SaganBolliger/nupic,brev/nupic,rcrowder/nupic,pulinagrawal/nupic,glorizen/nupic,scottpurdy/nupic,badlogicmanpreet/nupic,darshanthaker/nupic,rhyolight/nupic,go-bears/nupic,loretoparisi/nupic,numenta-ci/nupic,eranchetz/nupic,passiweinberger/nupic,go-bears/nupic,blueburningcoder/nupic,lscheinkman/nupic,BoltzmannBrain/nupic,elkingtonmcb/nupic,brev/nupic,cngo-github/nupic,allanino/nupic,marionleborgne/nupic,breznak/nupic,glorizen/nupic,allanino/nupic,ywcui1990/nupic,scottpurdy/nupic,vamsirajendra/nupic,blueburningcoder/nupic,markneville/nupic,chen0031/nupic,fergalbyrne/nupic,runt18/nupic,badlogicmanpreet/nupic,BeiLuoShiMen/nupic,lscheinkman/nupic,marionleborgne/nupic,pulinagrawal/nupic,markneville/nupic,neuroidss/nupic,blueburningcoder/nupic,akhilaananthram/nupic,metaml/nupic,numenta-ci/nupic,arhik/nupic,rhyolight/nupic,akhilaananthram/nupic,alfonsokim/nupic,jcasner/nupic,ben-hopps/nupic,numenta/nupic,rcrowder/nupic,marionleborgne/nupic,badlogicmanpreet/nupic,pap/nupic,BoltzmannBrain/nupic,vitaly-krugl/nupic,vamsirajendra/nupic,arhik/nupic,numenta/nupic,passiweinberger/nupic,vitaly-krugl/nupic,chen0031/nupic,rayNymous/nupic,go-bears/nupic,jcasner/nupic,loretoparisi/nupic,eranchetz/nupic,SaganBolliger/nupic,virneo/nupic,scottpurdy/nupic,GeraldLoeffler/nupic,numenta-ci/nupic,mcanthony/nupic,sambitgaan/nupic,ywcui1990/nupic,ben-hopps/nupic,EricSB/nupic,numenta/nupic,EricSB/nupic,neuroidss/nupic,mcanthony/nupic,markneville/nupic,vitaly-krugl/nupic,rayNymous/nupic,lscheinkman/nupic,GeraldLoeffler/nupic,passiweinberger/nupic,neuroidss/nupic,wanghaven/nupic,subutai/nupic,GeraldLoeffler/nupic,BoltzmannBrain/nupic,cogmission/nupic,sambitgaan/nupic,pap/nupic,chanceraine/nupic,brev/nupic,rcrowder/nupic,rayNymous/nupic,cogmission/nupic,runt18/nupic,cogmission/nupic,subutai/nupic,vamsirajendra/nupic,BeiLuoShiMen/nupic,alfonsokim/nupic,elkingtonmcb/nupic,ben-hopps/nupic,fergalbyrne/nupic,ywcui1990/nupic,eranchetz/nupic,rhyolight/nupic,chen0031/nupic,loretoparisi/nupic,arhik/nupic,glorizen/nupic,chanceraine/nupic,SaganBolliger/nupic,breznak/nupic,subutai/nupic,metaml/nupic,darshanthaker/nupic,akhilaananthram/nupic,chanceraine/nupic,cngo-github/nupic,pap/nupic,BeiLuoShiMen/nupic