Remove 32-bit references from Hadoop

[shreyamalviya]

What does this PR do?

Fixes a part of #1675

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the CHANGELOG.md updated to reflect the changes?
• Was the documentation framework updated to reflect the changes?

Testing Checklist

• Added relevant unit tests?
• Have you successfully tested your changes locally? Elaborate:

  Tested by {Running the Monkey locally with relevant config/running Island/...}

• If applicable, add screenshots or log transcripts of the feature working

[mssalvatore]

If you follow the chain of calls all the way down, download_monkey_exe() Eventually ends up calling monkey_island/cc/resources/monkey_download.py, which still has logic regarding 32-bit agents in it. We'll have to remove that in this PR as well.

[VakarisZ]

We will have the same architecture, because we presume it's 64 bit. I don't think we need this check. Instead, we should check the host architecture prior to exploitation and on a higher level than individual exploiters. In other words, we should check fingerprinter results and if we know it's 32 bit we shouldn't even launch the exploiters

[mssalvatore]

Looking into it.

[mssalvatore]

Approved pending a final test by @ilija-lazoroski