BACKLOG-1314 -- Document the REST calls for Carte (Kettle Path) (Part 2)

What was done:
1) uncommented JMeter tests
2) changed comments according to Chantel notes.
Merge pull request #866 from kolinus/BACKLOG-1314

[DOC] BACKLOG-1314 -- Document the REST calls for Carte (Kettle Path) (Part 2)