Stage-2 cluster: fix special filtering cases
Stage-2 cluster: add flag to switch on/off corner trimming (for taus)
Merge branch 'l1t-devel-CMSSW_7_1_0_pre8' of github.com:cms-l1t-offline/cmssw into jbsauvan-l1t-devel-CMSSW_7_1_0_pre8