Add option to RA range allocation request to pick numbers in ascending sequence, no matter that some lower numbers might have been released. In other words, possibly leave the holes of released numbers unused (like DB auto-increment ID column or a DB sequence).

Currently, when allocating from a range, RA always picks the first available number, thus reusing numbers that are released.

For this purpose, add new parameter to the RA DG Node (DG context variable) that turns this option on:

ra-input.range-next-in-sequence = true (default is false)