Add test for local login
Add test for local login

* Add an integration test to test that the login process for users
  registered locally to genenetwork2 works as expected.

genenetwork/genenetwork2,genenetwork/genenetwork2,DannyArends/genenetwork2,DannyArends/genenetwork2,zsloan/genenetwork2,DannyArends/genenetwork2,pjotrp/genenetwork2,zsloan/genenetwork2,pjotrp/genenetwork2,zsloan/genenetwork2,genenetwork/genenetwork2,genenetwork/genenetwork2,pjotrp/genenetwork2,zsloan/genenetwork2,DannyArends/genenetwork2,pjotrp/genenetwork2,DannyArends/genenetwork2,DannyArends/genenetwork2,pjotrp/genenetwork2