Reproducible example for JAVA-6299

[mateusz-nalepa]

Reproducible Example of Misleading Command Response Times: https://jira.mongodb.org/browse/JAVA-6299

How to run:

docker-compose up
run tests from TwoConcurrentRequestsSpecification

Look for logs like:

// response time below are ok, cause mongo thread is doing nothing, 
// so it can process response from database 
[mongo-thread-1] | 21:59:31 | stopped: mongodb.command in 5035.032042 ms
[mongo-thread-1] | 21:59:31 | stopped: mongodb.operation in 5047.782459 ms
[mongo-thread-1] | 21:59:36 | Runnable executed in: 5010 ms
[mongo-thread-1] | 21:59:36 | Runnable waited: 5011 ms

// response time below are misleading, cause mongo thread was busy, 
// by processing previous response from database
// this is sum of server sleep + thread pool task queue wait time
[mongo-thread-1] | 21:59:36 | stopped: mongodb.command in 10050.742625 ms 
[mongo-thread-1] | 21:59:36 | stopped: mongodb.operation in 10054.712417 ms