Add rolesJson to groups table

This will contain the roles ('role definition') of a group of
users. We will internally map these to our API scopes.

src/routes/test/clients-test.js

@@ -483,6 +483,8 @@ describe('Clients', function () {
     });
 
     describe('delete tokens by client', function () {
+        this.timeout(5000);
+
         before(setup2);
         after(cleanup);