This ticket was created to be an entry point to the new round of work on https://jira.mongodb.org/browse/SPM-3838. 

As it was discussed, the best way to start working on TSAN is just to choose some testing component and try to run it under TSAN. Examples was chosen as a candidate for this activity. So this ticket contains the following steps:

1. Run WT examples under TSAN one after another
2. Try to create tickets for the reported warnings/error
3. If some of warnings are simple ones, fix them straight away
4. Collect information and complex about more complicated ones

The main purpose of this ticket is to familiarize ourselves with the design of lock free synchronizations in WT, learn concepts and become more confident about further improvements.