Kong adapter not updating the api-group column for previous subscriptions

[shreyas-segu]

Scenario
An API which does not have any group associated with it, has multiple subscriptions.
Then a group gets attached/updated to the API, subscriptions from this point onwards will have the group name in the api_group column in the subscriptions table.

Expected behaviour
Ideally the kong-adapter should update the api_group column once the api group has been changed / updated