Implement a JVT hypo for jet trigger chains
This adds the possibility to add a JVT cut to jet trigger chains. The following chains were added to LS2_v1 menu:
HLT_j45_ftf_subjesgscIS_011jvt_L1J15 HLT_j45_ftf_subjesgscIS_015jvt_L1J15 HLT_j45_ftf_subjesgscIS_059jvt_L1J15
Tagging @khoo to let him know.