modify generic gridpack run script to allow using different compression types (in particular xz, which is needed to keep larger gridpacks under the 1GB frontier limit)
fixed M1 cfg file
Merge pull request #6038 from bendavid/gentunelhefix_71x

Fix for UE tune fragment and improvement to LHE run script (71x)
Merge remote branch 'origin/CMSSW_7_1_X' into CMSSW_7_0_X