* Make `verifyClient`, `checkAPE` receive `treeID` from request body;
* Make `newAPERequest` set `$Tree:ID` property
* Add unit-test to check if a rule for `$Tree:ID` works
Close#1701
Change-Id: I834fed366e8adfd4b5c07bf50aac09af6239991b
Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>