Summary:
Ttl-triggered and snapshot-release-triggered compactions should not be considered as manual compactions. This is a bug.
Closes https://github.com/facebook/rocksdb/pull/3678

Differential Revision: D7498151

Pulled By: sagar0

fbshipit-source-id: a2d5bed05268a4dc93d54ea97a9ae44b366df15d