Relabel the thrift_linter test to an integration test

test_thrift_linter is actually an integration test.  It is fast for an integration test, but slow as a unit test.

Testing Done:
ci si running

Bugs closed: 684

Reviewed at https://rbcommons.com/s/twitter/r/1171/
Sync of https://github.com/pantsbuild/pants/commit/6109df7e39117f2a4dec3059ef555f2cac10b729