compat: use: fail when pacakge is not found
compat: use: fail when pacakge is not found

But do not fail when trying to load *Config.cmake that are now
in qibuild/cmake
(PYTHON-TOOLS, QT-TOOLS for instance)

dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild