Add py-hail and requisite new versions to py-spark

[teaguesterling]

This adds the HAIL Python package (py-hail) (https://hail.is) installed from PyPI and some requisite updates to the py-pyspark to match the dependencies for HAIL.

This is a bit of a shortcut as HAIL can also be compiled from source instead of installed from PyPI. That would likely be a different package as it also provides a Jar and has some C libraries to build as well.

[spackbot-app]

Hi @teaguesterling! I noticed that the following package(s) don't yet have maintainers:

• py-pyspark

Are you interested in adopting any of these package(s)? If so, simply add the following to the package class:

    maintainers("teaguesterling")

If not, could you contact the developers of this package and see if they are interested? You can quickly see who has worked on a package with spack blame:

$ spack blame py-pyspark

Thank you for your help! Please don't add maintainers without their consent.

You don't have to be a Spack expert or package developer in order to be a "maintainer," it just gives us a list of users willing to review PRs or debug issues relating to this package. A package can have multiple maintainers; just add a list of GitHub handles of anyone who wants to volunteer.

[teaguesterling]

This was split up into multiple PRs