4 tests are broken on Docker 1.7

[julio-saito-linx]

After upgrade to Docker 1.7, 4 azk tests broke:

  1) Azk docker, ContainersObserver class should postal events about the containers:
     Error: timeout of 10000ms exceeded. Ensure the done() callback is being called in this test.


  2) Azk docker, ContainersObserver class should filter events about the containers:
     Error: timeout of 10000ms exceeded. Ensure the done() callback is being called in this test.


  3) Azk docker, ContainersObserver class should support stop observer:
     Error: timeout of 10000ms exceeded. Ensure the done() callback is being called in this test.


  4) Azk docker module, run method @slow should support extra docker options in start:
     AssertionError: expected { Object (Id, Created, ...) } to have a deep property 'Config.Memory'
      at callee$2$0$ (/azk:0.14.3/spec/docker/run_spec.js:177:35)
  From previous event:
      at Object.async (/azk:0.14.3/src/utils/promises.js:31:31)
      at Context.<anonymous> (/azk:0.14.3/spec/docker/run_spec.js:3:10)
      at Test.Runnable.run (/azk:0.14.3/spec/spec_helpers/mocha_with_async.js:34:18)
      at Hook.Runnable.run (/azk:0.14.3/spec/spec_helpers/mocha_with_async.js:34:18)