DQMIO: backport for workflows in production

We want to place relval tests using DQMIO. Eventually this feature will allow drastic PU increases in relval production.
- back port the last DQMIO features to 620_SLHC
- back-port of configBuilder to handle DQMIO
- relval matrix uses DQMIO for workflow injection to production. --revertDqmio=yes available if one needs to use old DQM