PanTau: set default p4 to TauEtaCalib (ATLTAU-1665)
When PanTau fails, the p4 will at the default value, i.e. -1111. As it has bad consequence when retrieving the p4, we now set the default four momentum at TauEtaCalib.
When PanTau fails, the p4 will at the default value, i.e. -1111. As it has bad consequence when retrieving the p4, we now set the default four momentum at TauEtaCalib.