Fix up cells4 test to conform to unittest format and to fix style issues.
Fix up cells4 test to conform to unittest format and to fix style issues.

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