Integrate component-mocker

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https://www.npmjs.org/package/component-mocker

• Use component-mocker to create the mocks from the objects

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• We can save the stub metadata that is generated by mocker.getMetadata to the stub file and use mocker.generateFromMetadata in the out of context runner to generate the concrete stub objects. We can easily generate new concrete stub objects for each test. (the metadata abstraction is really nice :-))
• All packages are loaded into the global Package object. That makes it easy to just stub the packages. With that we no longer need other package detection strategies I guess. Just:

var stubsMetadata = mocker.getMetadata(Package)
fs.writeFile('stubs-metadata.json', JSON.stringify(stubsMetadata, null, '  '))`