VxJetVertex → VxVertex Relation

File in Tracking/TrkEvent/VxJetVertex	Includes file in Tracking/TrkEvent/VxVertex
src / TwoTrackVerticesInJet.cxx	VxVertex / VxCandidate.h
src / VxJetCandidate.cxx	VxVertex / VxTrackAtVertex.h
VxJetVertex / VxJetCandidate.h	VxVertex / VxCandidate.h