Description of problem:
Looking at code for all different versions of CP, it seems we are not logging information about deleted consumers that are being deleted with an environment

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Create an environment and assign some consumers to it
2. Delete the environment through /environments resource. 

Actual results:
Logs/Audit doesn't contain information that consumers have been deleted

Expected results:
Logs/Audit contains the information

Additional info:
This is very important when trying to figure out why a specific consumer is missing in the database.