Docs for SERVER-34779: Check the dbhash periodically in a new version of the replica_sets_jscore_passthrough.yml test suite

Description:

The dbHash command now returns the names of any capped collections in a new "capped" field. The dbHash command also now returns the UUIDs associated with any collections in a new "uuids" field.

Scope of changes:

• 4.0
• dbhash ref page
• for now, won't reference in capped collections page since we tell people to use the isCapped() method to check if capped.

Impact to other docs outside of this product:

MVP:

Resources:

Engineering Ticket Description:

We should create another version of jstests/libs/override_methods/run_check_repl_dbhash.js and possibly of ReplSetTest#checkReplicatedDataHashes() that doesn't require (1) flushing background indexes with collMod operations, (2) fsync+locking the primary, and (3) call ReplSetTest#awaitReplication(). A background thread inside of resmoke.py should then run the "dbhash" command periodically via the hook file and cause the test to be marked as a failure if a data inconsistency is detected.