fixed wrong indentation
indenting is 4 spaces, not 1, or 2 or a combination of 1,2,4...
Integrate CMSSW: change used python from python2 to python
mods to use new DBS and DLS API
update to use the improved DBS API that use the CGI server on cmsdoc
improvements to deal with error conditions ( i.e. dataset not existing, invalid datatie .... etc with changed DBS API)
fix in the dbspath to be passed to the DBS API
class to perfom data discovery based on DBS
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