Summary:
FaultInjectionTestFS::NewDirectory currently asserts that the directory
creation on the target filesystem succeeds. This is actually not
guaranteed since there might be a legitimate I/O error when creating the
directory. The patch removes this assertion.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7220
Test Plan: `make check`
Reviewed By: zhichao-cao
Differential Revision: D22957990
Pulled By: ltamasi
fbshipit-source-id: b2e221320d8ce7235cb4897ef5936072412a25b6