Merge branch 'marcburnie-master-patch-26359' into 'master'

The incorrect environment variable name is being passed in on the aws-update-helm job. The current name, DOMAIN_NAME, is not defined and passes in an empty string to the helm chart. The correct environment variable name is DOMAIN. This environment variable is only used by Entitlements service and is responsible for setting the entitlements domain. When the aws-update-helm stage is run, it overwrites the current environment variable with an empty string, causing the integration test stage to fail as well as any services that use entitlements service for validating group names.

See merge request !735 (merged)

(cherry picked from commit b3ab105a)

0f8a579a fixing entitlements domain name var