cleanup working directory when finished (to leave more space for additional job output in multistep workflows)
changes in cmsDriver to allow LHE and GEN steps to run in the same job, ensuring also that output module for lhe event content is unfiltered
Merge pull request #4611 from bendavid/lhegenonestep71x

Changes to allow wmLHE and GEN-SIM to run in a single job (71x)