re-introduce replaces which force DQM in production (in place of DQMio)
introduce --revertDqmio=yes/no to switch back to pool DQM in configuration sent to wmcontrol (DQMIO is untouched if chosen for local workflows)
fix of indentation bug (thanks to Giulio and Shahzad for spotting, seee #2695)
Merge pull request #2545 from franzoni/from-CMSSW_7_0_0_revert_DQMIO_option_rebased_CMSSW_7_0_X

Configuration/PyReleaseValidation -- matrix option to revert DQMIO back to pool