Code for infeasibility diagnostics called mis

[DLWoodruff]

Fixes # .

Summary/Motivation:

Finds sets of actions that each, independently,
would result in feasibility. It also computes a minimal intractable system
(which is not guaranteed to be unique). It was written by Ben Knueven
as part of the watertap project and is governed by a license shown
at the top of the mis.py.

The algortithms come from John Chinneck's slides, see: https://www.sce.carleton.ca/faculty/chinneck/docs/CPAIOR07InfeasibilityTutorial.pdf

Changes proposed in this PR:

• create a new package called mis in contrib

Legal Acknowledgement

By contributing to this software project, I have read the contribution guide and agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the BSD license.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[DLWoodruff]

Some tests seem to be failing due to infrastructure issues (e.g. an Xpress license seized the once-every-four-years opportunity to expire on Feb 29!)

[mrmundt]

Some tests seem to be failing due to infrastructure issues (e.g. an Xpress license seized the once-every-four-years opportunity to expire on Feb 29!)

Infrastructure issues have been fixed - I merged the changes into your branch.

[DLWoodruff]

Now that the infrastructure issues are fixed (Thanks!) some tests are failing due to contention for temp files, but only on windows platforms. I will try to get some help with this.

[blnicho]

@DLWoodruff @bknueven would either of you be able to attend a future Pyomo dev meeting to talk about this PR? We're curious if this should be added as an alternative in pyomo.contrib.iis rather than a stand-alone contrib package.

[bknueven]

@DLWoodruff @bknueven would either of you be able to attend a future Pyomo dev meeting to talk about this PR? We're curious if this should be added as an alternative in pyomo.contrib.iis rather than a stand-alone contrib package.

I would be able to attend -- though next week is not good.

I agree that this capability should probably be folded into pyomo.contrib.iis.

[DLWoodruff]

All conversations have been resolved. Thanks again for the thorough review.

[mrmundt]

Thanks, @DLWoodruff ! I did another pass and have some more comments (that are mostly stylistic/quality)

[DLWoodruff]

All conversations have been resolved and thanks again for the thorough and constructive reviews.

[Robbybp]

A small string formatting fix, otherwise this looks good.

[Robbybp]

Assuming the Pypy test failure is unrelated, this looks good to me