fix imports in discovery
fix imports in discovery

aterrel/datashape,cpcloud/datashape,quantopian/datashape,cpcloud/datashape,ContinuumIO/datashape,cowlicks/datashape,blaze/datashape,quantopian/datashape,blaze/datashape,cowlicks/datashape,llllllllll/datashape,aterrel/datashape,ContinuumIO/datashape,llllllllll/datashape