Issue description

The grading script is not considering that the env variables could be mounted from a secret. 

I created a secret with:
oc create secret generic blabla --from-literal MYSQL_USER=operator1 --from-literal MYSQL_PASSWORD=redhat123 --from-literal MYSQL_DATABASE=quotes

and I attached it to deployment using:
oc set env deployment/quotesdb --from secret/blablah
and although MySQL started. The grade script didn't pass this point for me.