Investigate on REST performance regression on FT 9.1

From the milestone benchmark report it looks like that:
on creation REST the throughput is limited around 1500 req/s instead of scaling to 2000 req/s with 4 nodes.
A possible reason for this is the new versioning that may generate one more version at creation time (to be checked).

Update and therefore CRUD simulations are also impacted.

There is probably a GC overwhelm that happens during the JSF simulation which is run before Update and CRUD that should be taken in account.