Add new decorator which behaves like OEHasPackage, but
fails the testcase if a dependency isn't met.
This helps to identify missing packages in the image
under test when using static test suite lists, otherwise
a missing package won't fail the overall test suite and
errors might slip through unnoticed
Signed-off-by: Konrad Weihmann <kweihmann@outlook.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
