Check for unschedule attribute only, if available.
added configuration for new P6 and P8 tunes
cleanup fragments
Merge pull request #3999 from vciulli/newP6P8Tunes_62x

New p6 p8 tunes 62x
Merge pull request #3931 from vadler/62X-fixMetUncertaintyToolsScheduled

62X - fix `metUncertaintyTools` for scheduled processing
Merge remote branch 'origin/CMSSW_6_2_X' into CMSSW_7_0_X