qsharp hangs on conda installations

[anpaz]

Describe the bug Our build scripts are randomly timing out when running tests for our conda package. For example: https://dev.azure.com/ms-quantum-public/Microsoft%20Quantum%20(public)/_build/results?buildId=35502&view=results Normally these self-fix after trying to run the failed jobs again. I'm afraid these are not specific to our build environment and that it happens for any one using our conda packages.

To Reproduce Run the microsoft.iqsharp build, there is a high probability that one of the conda steps will hang.

Additional context After some investigation, it seems that it's another instance of #510 since for #501 we relaxed the pyzmq requirement.