Add tests to confirm that a mis-configured MultiPortModulesStage will raise an exception rather than segfaulting

[dagardner-nv]

Description

• MRC PR Fix EdgeHolder from incorrectly reporting an active connection MRC#402 fixed this issue, this PR adds some unittests to ensure this.
• Update Pipeline.build_and_start to re-raise any exceptions raised during build, this prevents Pipeline.join from being called which avoids a failed assert in join since the expected future was not created.

Closes #953

By Submitting this PR I confirm:

• I am familiar with the Contributing Guidelines.
• When the PR is ready for review, new or existing tests cover these changes.
• When the PR is ready for review, the documentation is up to date with these changes.

[dagardner-nv]

/merge