Summary:
As db_stress with CompactFiles possibly catches a previous bug currently,
temporarily disable CompactFiles in db_stress in its default setting
to allows new bug to be detected while investigating the bug in CompactFiles.
Test Plan: crash test
Reviewers: sdong, kradhakrishnan, IslamAbdelRahman
Reviewed By: IslamAbdelRahman
Subscribers: andrewkr, dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D57333