Squashed 'Core/CppMicroServices/' changes from 2a5abcb..e8a4f21

e8a4f21 Fixed ServiceReference conversion test in case of an invalid reference.

git-subtree-dir: Core/CppMicroServices
git-subtree-split: e8a4f21aa7286ceb5c65db05c121859872ee8401

Conflicts:
src/service/usServiceReferenceBasePrivate.cpp