Update the bottom solver default absolute tolerance

[marchdf]

Summary

Update the bottom solver default absolute tolerance.

Pull request type

Please check the type of change introduced:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Checklist

The following is included:

• new unit-test(s)
• new regression test(s)
• documentation for new capability

This PR was tested by running:

• the unit tests
  • on GPU
  • on CPU
• the regression tests
  • on GPU
  • on CPU

Additional background

Issue Number:

[marchdf]

@moprak-nrel, @mbkuhn, @jrood-nrel this causes diffs in all the tests. They are all around 1e-12. Which I would expect having changed the default bottom solver tolerance.