Summary:
Right now, stress test cannot be configured to use memtable whole key filter without prefix filter. It doesn't appear to be necessary. remove this constraint.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/7937
Test Plan: "make crash_test" to be able to run.
Reviewed By: ltamasi
Differential Revision: D26295532
fbshipit-source-id: 30c874a9dc2b672a460603a4ee32368674e0face