Vine: Make tests use ports consistently.

[dthain]

Fixed vine tests to all use any available port (port=0) and skip the use of manager reporting, so that we don't have vine_status polluted with a lot of test jobs.

Proposed Changes

Give an overall description of the changes, along with the context and motivation.
Mention relevant issues and pull requests as needed.

• Remove manager name reporting from automated tests.

Merge Checklist

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• make test Run local tests prior to pushing.
• make format Format source code to comply with lint policies. Note that some lint errors can only be resolved manually (e.g., Python)
• make lint Run lint on source code prior to pushing.
• Manual Update: Update the manual to reflect user-visible changes.
• Type Labels: Select a github label for the type: bugfix, enhancement, etc.
• Product Labels: Select a github label for the product: TaskVine, Makeflow, etc.
• PR RTM: Mark your PR as ready to merge.