update run1 gensim

1) updated GEN-SIM input for run1 workflows; 
2) remove hard-coded GEN-SIM input for QCD_FlatPt_15_3000HSINPUT ; 
3) introduce Cosmics_UP15 for postLs1 cosmics
4) temporarily remove Cosmics wf 7, while we make GEN-SIM for it in pre7;  
5) add Cosmics_UP15 for cosmics with post-LS1 geometry (gen-sim to be done in pre6)

These chances will re-establish the run1 relval workflows which have been broken by the ak4GenJets migration.