take a stab at fixing up integration tests on lego-linux
take a stab at fixing up integration tests on lego-linux

Summary:
The hg configuration on our internal lego-linux boxes is
wonky and is leading to some false positive failures in this test,
so we want to skip.

This diff attempts to change the test to detect the broken config
and skip the test.

Reviewed By: bolinfest

Differential Revision: D6626326

fbshipit-source-id: 946f165f2f81303b63aa7f330087398652f9f5df

wez/watchman,facebook/watchman,nodakai/watchman,wez/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,wez/watchman,wez/watchman,nodakai/watchman,facebook/watchman,wez/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,facebook/watchman,wez/watchman,wez/watchman,facebook/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,wez/watchman,nodakai/watchman,wez/watchman