Start moving db code to use BoxError as well

src/test/groups-test.js

@@ -9,7 +9,6 @@
 var async = require('async'),
     BoxError = require('../boxerror.js'),
     database = require('../database.js'),
-    DatabaseError = require('../databaseerror.js'),
     expect = require('expect.js'),
     groups = require('../groups.js'),
     hat = require('../hat.js'),
@@ -166,7 +165,7 @@ describe('Groups', function () {
 
     it('did delete mailbox', function (done) {
         mailboxdb.getList(GROUP0_NAME.toLowerCase(), DOMAIN_0.domain, function (error) {
-            expect(error.reason).to.be(DatabaseError.NOT_FOUND);
+            expect(error.reason).to.be(BoxError.NOT_FOUND);
             done();
         });
     });