MT#8633 Properly set is_primary on sub creation

(cherry picked from commit 4f76fdaf96e0906aab9ae0c24b22fcb8ec210527)
(cherry picked from commit 803dd50c11049040cf065d64e1a7fd0fd5abebf5)
MT#8449 Fix clearing unused alias numbers

Take billing.voip_numbers as reference for clearing unused dbalias
entries.

(cherry picked from commit b860218f912e098da0f4946ee77dfe34742c5fc0)

Conflicts:
	lib/NGCP/Panel/Utils/Subscriber.pm

(cherry picked from commit b84b950f8ba53138eb87b0e3db49f97faa0d9495)