Jaraco-test

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Moved hosting to Github.

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Moved services module to ``jaraco.test.services`` and
``jaraco.mongodb.service``.

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Extend timeout for MongoDB mongod to listen on the port from
one second to three seconds, preventing spurious failures
on slower systems.

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Replace lingering reference to removed socket_test module.

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Fix issue in MongoDB finder where MONGODB_HOME wasn't honored.

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Removed jaraco.test.socket_test. Use portend instead.

Use setuptools_scm for version generation.