config flag ALWAYS_TAG_CMSSW added to always tag the cmssw

- set ALWAYS_TAG_CMSSW=1 in config.map for release which we know are broken. This allows us to not re-build the release unless there are any cmssw/cmsdist changes.
- CMSSW_7_3_ICC_X release updated to to make use of this flag.
- missing last ; added for few line in config.map