1. example of specifying a worker package in the transformation catalog
   pegasus_worker = Transformation(
   "worker",
   namespace="pegasus",
   site="condorpool",
   pfn="https://download.pegasus.isi.edu/pegasus/4.8.0dev/pegasus-worker-4.8.0dev-x86_64_macos_10.tar.gz",
   is_stageable=True,
   )

Remove "version=1.0" for proper staging of the worker package.