Adapter regression in 3.4

[avoidwork]

Updating https://github.com/avoidwork/rozu resulted in this build error

TypeError: Parameter "url" must be a string, not undefined
>>   at Url.parse (url.js:81:11)
>>   at Object.urlParse [as parse] (url.js:75:5)
>>   at module.exports (/home/travis/build/avoidwork/rozu/node_modules/mongodb/lib/url_parser.js:15:23)
>>   at connect (/home/travis/build/avoidwork/rozu/node_modules/mongodb/lib/mongo_client.js:403:16)
>>   at Function.MongoClient.connect (/home/travis/build/avoidwork/rozu/node_modules/mongodb/lib/mongo_client.js:227:3)
>>   at db (/home/travis/build/avoidwork/rozu/node_modules/haro-mongo/lib/index.js:26:10)
>>   at cmd (/home/travis/build/avoidwork/rozu/node_modules/haro-mongo/lib/index.js:63:2)
>>   at Haro.adapter (/home/travis/build/avoidwork/rozu/node_modules/haro-mongo/lib/index.js:157:2)
>>   at Haro.cmd (/home/travis/build/avoidwork/rozu/node_modules/haro/lib/haro.es6.js:424:29)
>>   at Haro.load (/home/travis/build/avoidwork/rozu/node_modules/haro/lib/haro.es6.js:601:16)
>>   at i (/home/travis/build/avoidwork/rozu/lib/stores.js:29:23)
>>   at Array.each (/home/travis/build/avoidwork/rozu/lib/iterate.js:15:25)
>>   at each (/home/travis/build/avoidwork/rozu/node_modules/retsu/lib/retsu.js:153:13)
>>   at iterate (/home/travis/build/avoidwork/rozu/lib/iterate.js:15:3)
>>   at Object.<anonymous> (/home/travis/build/avoidwork/rozu/lib/stores.js:24:1)
>>   at Module._compile (module.js:571:32)
>>   at Object.Module._extensions..js (module.js:580:10)
>>   at Module.load (/home/travis/build/avoidwork/rozu/node_modules/coffee-script/lib/coffee-script/register.js:45:36)
>>   at tryModuleLoad (module.js:447:12)
>>   at Function.Module._load (module.js:439:3)
>>   at Module.require (module.js:498:17)
>>   at require (internal/module.js:20:19)
>>   at Object.<anonymous> (/home/travis/build/avoidwork/rozu/lib/login.js:6:11)
>>   at Module._compile (module.js:571:32)
>>   at Object.Module._extensions..js (module.js:580:10)
>>   at Module.load (/home/travis/build/avoidwork/rozu/node_modules/coffee-script/lib/coffee-script/register.js:45:36)
>>   at tryModuleLoad (module.js:447:12)
>>   at Function.Module._load (module.js:439:3)
>>   at Module.require (module.js:498:17)
>>   at require (internal/module.js:20:19)
>>   at Object.<anonymous> (/home/travis/build/avoidwork/rozu/index.js:6:10)
>>   at Module._compile (module.js:571:32)
>>   at Object.Module._extensions..js (module.js:580:10)
>>   at Module.load (/home/travis/build/avoidwork/rozu/node_modules/coffee-script/lib/coffee-script/register.js:45:36)
>>   at tryModuleLoad (module.js:447:12)
>>   at Function.Module._load (module.js:439:3)
>>   at Module.require (module.js:498:17)
>>   at require (internal/module.js:20:19)
>>   at Object.<anonymous> (/home/travis/build/avoidwork/rozu/test/app_test.js:2:8)
>>   at Module._compile (module.js:571:32)
>>   at Object.Module._extensions..js (module.js:580:10)
>>   at Module.load (/home/travis/build/avoidwork/rozu/node_modules/coffee-script/lib/coffee-script/register.js:45:36)
>>   at tryModuleLoad (module.js:447:12)
>>   at Function.Module._load (module.js:439:3)
>>   at Module.require (module.js:498:17)
>>   at require (internal/module.js:20:19)
>>   at /home/travis/build/avoidwork/rozu/node_modules/mocha/lib/mocha.js:222:27
>>   at Array.forEach (native)
>>   at Mocha.loadFiles (/home/travis/build/avoidwork/rozu/node_modules/mocha/lib/mocha.js:219:14)
>>   at Mocha.run (/home/travis/build/avoidwork/rozu/node_modules/mocha/lib/mocha.js:487:10)
>>   at MochaWrapper.run (/home/travis/build/avoidwork/rozu/node_modules/grunt-mocha-test/tasks/lib/MochaWrapper.js:44:13)
>>   at /home/travis/build/avoidwork/rozu/node_modules/grunt-mocha-test/tasks/mocha-test.js:84:20
>>   at capture (/home/travis/build/avoidwork/rozu/node_modules/grunt-mocha-test/tasks/mocha-test.js:31:5)
>>   at Object.<anonymous> (/home/travis/build/avoidwork/rozu/node_modules/grunt-mocha-test/tasks/mocha-test.js:79:5)
>>   at Object.<anonymous> (/home/travis/build/avoidwork/rozu/node_modules/grunt/lib/grunt/task.js:255:15)
>>   at Object.thisTask.fn (/home/travis/build/avoidwork/rozu/node_modules/grunt/lib/grunt/task.js:73:16)
>>   at Object.<anonymous> (/home/travis/build/avoidwork/rozu/node_modules/grunt/lib/util/task.js:294:30)
>>   at Task.runTaskFn (/home/travis/build/avoidwork/rozu/node_modules/grunt/lib/util/task.js:244:24)
>>   at Task.<anonymous> (/home/travis/build/avoidwork/rozu/node_modules/grunt/lib/util/task.js:293:12)
>>   at /home/travis/build/avoidwork/rozu/node_modules/grunt/lib/util/task.js:220:11
>>   at _combinedTickCallback (internal/process/next_tick.js:73:7)
>>   at process._tickDomainCallback (internal/process/next_tick.js:128:9)
>>   at Module.runMain (module.js:607:11)
>>   at run (bootstrap_node.js:423:7)
>>   at startup (bootstrap_node.js:147:9)
>>   at bootstrap_node.js:538:3