GPII-413: Add a Device Reporter plugin based-up on PackageKit

This pull request includes a first device reporter plugin, which uses the packageKit node module.
As a brief explanation, the deviceReporter plugin is being initialized at start-up time and stores all the installed packages in memory, which is used later on in order to provide a quick response.

Currently, and as a demonstration of how it works, [this pull request] includes the bits on the solution registry to use this new functionality.

To try this new feature, you have to start de the GPII in production mode, this is: <pre>NODE_ENV="fm.ps.sr.dr.mm.os.lms.production" node gpii.js</pre>

  [this pull request]: https://github.com/GPII/universal/pull/246
This global effect needs to be i) wrapped by some kind of driver function which abstracts it, so that we are not just banging away changing global state directly, ii) protected by a teardown function in a "finally" block that returns the global state to its original condition. It's essential that every test case leaves the global state of the system unchanged once it has executed.