Fixed getting subscription (GONRG-7693)

The method for getting subscriptions was called recursively when there were no subscriptions in the cache.

MR in master: !420 (merged)

changed milestone to %M20 - Release 0.23

added GC label

requested review from @Rustam_Lotsmanenko

assigned to @chad

added Cherry-pick label

added MRBugfix label

requested review from @chad and @debasisc

assigned to @divido and @Srinivasan_Narayanan

approved this merge request

mentioned in commit 009a8fe1

merged