AMP_RELEASE is not upgraded from 2.10 to 2.11 on an Operator Upgrade

After upgrade,

$ oc rsh -c system-master dc/system-app /bin/bash -c "env | grep AMP_RELEASE"
AMP_RELEASE=2.10

It is set correctly to 2.11 on a fresh install of 3scale.

If this is used to determine if 3scale upgrade is successful, this can be misleading. 3scale docs do describe the new annotation values to determine if 3scale upgrade has been successful. However, this may be missed and AMP_RELEASE checked instead.