Describe the bug

Providing NULL to the send callback of ucp_put_nb leads to a seg. fault.

From looking at the code with @shamisp the problem appears to be that ucp_request_set_callback unconditionally sets UCP_REQUEST_FLAG_CALLBACK.

Publish to pypi checklist:

• pykwalify requirements changes (1.7.1+)
• Create setup.py
  • Migrate requirements.txt
  • Add entry_points
  • Add README.md ingestion
• Update travis with publish step
• Update README/install docs with pypi option (with caveats)

Scala for loops on range objects are super slow. We should replace then with the while loops. I will do it in next few days

The following github
git clone [email protected]:Azure/cyclecloud-vFXT.git
is referenced in the Avere cyclecloud tutorial, Has this repository been moved or do I need to request access to it?

Thanks,
Cormac.

We should think of getting rid of the IP/port hardcoded values scattered throughout the tests.

A benefit of the hard coded values is that they simplify testing because we only need to call the binary to run the test -- no need to create a custom launch script.

We will need to create a python script to launch these tests.

The IP/port values can come from a few places:

1. ./configure --te