fix FixMatrixInjector required after changes in reqMgr 0.9.79   https://twiki.cern.ch/twiki/bin/viewauth/CMS/DMWMReleaseNotesReqMgrTestbed; acknowledgements to Alan Malta Rodrigues
Merge pull request #895 from franzoni/FIX-FixMatrixInjector-700pre4

PDMV fix -- Fix FixMatrixInjector required after changes in reqMgr 0.9.79