[QA] Find out Stability Boundaries (number of clients and nodes for stable work)

The goals are

1) To find out the 'stability boundaries', that is how many treads (clients) and nodes in the pool we may have for a correct and stable work and when we start facing stability issues.

2) Measure performance based on the number of clients and nodes in the pool.

Things to be tested:
1. Set up the large pool.
2. Run load test with 1 thread writing.
3. Reset the pool.
4. Run load test with greater amount of threads.
5. Repeat steps 3-4 until problems like INDY-1180 will reproduce.