Revert "remove test for allowing just mobile user"
Revert "remove test for allowing just mobile user"

This reverts commit 63f99d3c12ed77cb704cd7f9b90970eb6004d462.

dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq,dimagi/commcare-hq