click_package/tests/: Propagate DEFAULT_ROOT name as defined by configure script
click_package/tests/: Propagate DEFAULT_ROOT name is defined by configure script over to unit tests.
This addresses #2.
CI status: https://ci.ubports.com/blue/organizations/jenkins/UBportsCore%2Fclick/activity?branch=MR-4
Edited by Ratchanan Srirattanamet