DQMIO in place of DQMROOT (see: https://hypernews.cern.ch/HyperNews/CMS/get/comp-ops/1592.html and https://hypernews.cern.ch/HyperNews/CMS/get/comp-ops/1587/1/2/2/1/2/2/1/1/2.html )
Merge pull request #5117 from franzoni/WMCore_deguio_franzoni_DQMIO

DQMIO in place of DQMROOT