Raise exception when cannot find configuration.
Raise exception when cannot find configuration.

Fixes #1645.

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