We changed the pypi package name to kuryr-lib so we need to give a hint
to testr so it knows where to find the module for coverage.
Closes-bug: #1628843
Change-Id: Ic1a8576a4ced2615152889b7ab742bb00a4ce565
Signed-off-by: Antoni Segura Puimedon <antonisp@celebdor.com>