Displaying the MaxScale version helps identify which package the
executable was bundled with. As the MaxCtrl source is a part of MaxScale,
there's no need for separate versioning.
Moved MaxCtrl into a separate package to simplify packaging and
distribution process. Having the client as a separate component allows one
set of packages to be used on multiple platforms.
As the REST API is a part of the core, it is more appropriate for the
tests to reside there as well. Further refactoring of the testing needs to
be done to allow multiple components to use the same framework but with
different tests.
