This test should do a mix of operations both inside and outside of transactions that stress concurrency of DDL operations both within and outside of transactions.

Operations to test:

• update with {{upsert : true }}
• insert
• createIndexes
• create, both with and without extra indexes beyond _id

Conditions to test:

• database, collection and indexes exist
• database exists, but collection and indexes don't
• database doesn't exist
• test multiple operations on the same collection inside a multi-document transaction
• test multiple operations on multiple collections inside a multi-doc transaction
• test operations outside a multi-doc transactions
• concurrent drop command (outside of transaction)