Default the two args of SerializationTestPyRegion.initialize to None so that calling Network.initialize on a simple one-region network would't fail with "TypeError expected 3 args but got one"
Default the two args of SerializationTestPyRegion.initialize to None so that calling Network.initialize on a simple one-region network would't fail with "TypeError expected 3 args but got one"

neuroidss/nupic.core,neuroidss/nupic.core,lscheinkman/nupic.core,scottpurdy/nupic.core,subutai/nupic.core,numenta/nupic.core,scottpurdy/nupic.core,breznak/nupic.core,rcrowder/nupic.core,numenta/htmresearch-core,rhyolight/nupic.core,rcrowder/nupic.core,numenta/htmresearch-core,rhyolight/nupic.core,breznak/nupic.core,neuroidss/nupic.core,subutai/nupic.core,neuroidss/nupic.core,breznak/nupic.core,breznak/nupic.core,rhyolight/nupic.core,lscheinkman/nupic.core,rcrowder/nupic.core,subutai/nupic.core,numenta/htmresearch-core,subutai/nupic.core,numenta/nupic.core,numenta/nupic.core,rcrowder/nupic.core,scottpurdy/nupic.core,numenta/htmresearch-core,lscheinkman/nupic.core,lscheinkman/nupic.core,rhyolight/nupic.core,numenta/nupic.core,scottpurdy/nupic.core