[BB-5077] fix: End of trial email sent to paying customer
Description
This PR is fix for a bug identified in OCIM application, where a paying client would get an end of trial reminder email after they launched a new appserver
Supporting information
Testing instructions
- Register a new trial instance in OCIM
- Once the first app server is ready, delete the corresponding entry created in Subscribers table from the Django admin page
- Launch a new appserver from console
- After the new appserver is up and ready, check that there should be no new entry in the Subscribers table
Deadline
"None"