Order route, change switch case un authentication

routes are order by level

in function exports.requiredConsistentID and
exports.requiredAuthentication, replace number in switch case by real
name (1="corpus", 3="media", 5="layer", 7="annotation")
clean
Add test on bad role for new user
Update user : add role, del name

Add modification of the user role limited to 3 roles (admin,
supervisor, user)
Delete the modification of the user name
delete exports.chmodUser from authenticate.js
...