if(m_dbg) in front of cout
call xAOD::setOriginalObjectLink on the shallow copies

This fixes the error below

METRebuilderTool        WARNING Modified container provided without originalObjectLink -- cannot proceed.
METRebuilderTool        WARNING Problem with input object container -- skipping these terms.

Following what's done in SUSYToolTester.
Note that for some of the muons the link to the track from the inner
detector is not available, causing

Info in <xAOD::TAuxStore::setupAuxBranch>: Variable CombinedMuonTrackParticlesAuxDyn.trackLink will not be available for reading/copying
Info in <xAOD::TAuxStore::setupAuxBranch>: Variable ExtrapolatedMuonTrackParticlesAuxDyn.trackLink will not be available for reading/copying

To be investigated.