Summary:
We currently do not have any validation that would ensure that the `FileMetaData`
objects are equivalent when a file gets deleted from the LSM tree and then re-added
(think trivial moves); however, if we did, this test case would be in violation. The patch
changes the values used in the test case so they are consistent.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/6942

Test Plan: `make check`

Reviewed By: zhichao-cao

Differential Revision: D21911366

Pulled By: ltamasi

fbshipit-source-id: 2f0486f8337373a6a111b6f28433d70507857104