Add a script to check for outdated Maven dependencies

Add a script to check for outdated Maven dependencies

We already have a Hudson job that runs this, we could commit
the script in the git tree so that it can be run locally.

Change-Id: Iefcae17dad4639e917e3440bce6929811773bd9c
Signed-off-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-on: https://git.eclipse.org/r/51682
Reviewed-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Tested-by: Marc-Andre Laperle <marc-andre.laperle@ericsson.com>
Reviewed-by: Hudson CI