Feature #3187 generate MET configs

[georgemccabe]

Merging without review since this is an internally-used helper script. @hertneky tested the script and confirmed that it accomplishes what we need.

[coveralls]

Pull Request Test Coverage Report for Build 21641661411

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.501%

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Totals
Change from base Build 21639814746:	0.0%
Covered Lines:	9510
Relevant Lines:	10281

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💛 - Coveralls