docker_cmake: clear out older build
docker_cmake: clear out older build

amccaskey/DataTransferKit,ORNL-CEES/DataTransferKit,Rombur/DataTransferKit,amccaskey/DataTransferKit,Rombur/DataTransferKit,dalg24/DataTransferKit,Rombur/DataTransferKit,ORNL-CEES/DataTransferKit,dalg24/DataTransferKit,dalg24/DataTransferKit,Rombur/DataTransferKit,amccaskey/DataTransferKit,ORNL-CEES/DataTransferKit,amccaskey/DataTransferKit,dalg24/DataTransferKit,ORNL-CEES/DataTransferKit