Bug 976758 & 969948 - Update the name of internal IP env var to match v2 carts
https://bugzilla.redhat.com/show_bug.cgi?id=976758
https://bugzilla.redhat.com/show_bug.cgi?id=969948
Changed the OPENSHIFT_INTERNAL_IP env var in index.html and start hook to OPENSHIFT_DIY_IP