Summary:
memory_test.cc has some tests that are not unstable but
hard to reproduce, and the cause is the test itself not
the code. Temporarily disable the tests until
we have a good fix.
Test Plan: memory_test
Reviewers: sdong, anthony, IslamAbdelRahman, rven, kradhakrishnan
Subscribers: dhruba, leveldb
Differential Revision: https://reviews.facebook.net/D54009
2a04268be3