delete directories created from symlinks after copy to tmp so that they no longer cause tests to fail when pants tries to soft unlink them

Testing Done:
ran tests, only true failures failed.

Reviewed at https://rbcommons.com/s/twitter/r/1424/
clean-up to consume pants_target_type from depmap output

Testing Done:
added integration test is passing

Reviewed at https://rbcommons.com/s/twitter/r/1415/
Merge branch 'master' into exclude-fixes