remove outer (pants_exe) lock and serialized cmd

Review Request #1388 - Created Nov. 21, 2014 and submitted

Information
David Taylor
pants
817
32670e0...
Reviewers
pants-reviews
benjyw, jsirois, patricklaw

All two subcalsses of command (eg GoalRunner and SetupPy) do not override serialized to return True and thus do not require the outer lock.
Removing it simplifies pants_exe and reduces the number of places we depend on dirutil.Lock and shutil.

https://travis-ci.org/pantsbuild/pants/builds/41782185

Benjy Weinberger
Eric Ayers
Patrick Lawson
Eric Ayers
David Taylor
David Taylor
Review request changed

Status: Closed (submitted)

Change Summary:

d59ea8e8ed01be36ceab5ebfd1d4079fdd2a60c5
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