update Berksfile to use master  branches
update Berksfile to use master  branches

ekeroid/hopsworks-chef,hopshadoop/hopsworks-chef,hopshadoop/hopsworks-chef,ekeroid/hopsworks-chef,ekeroid/hopsworks-chef,hopshadoop/hopsworks-chef,hopshadoop/hopsworks-chef,ekeroid/hopsworks-chef