Merge pull request #225 from smuzaffar/master

updated pkgtools tag V00-22-02 for 62X slc6
Set up IBs for CMSSW_7_4_DEVEL_X
Merge pull request #226 from nclopezo/add-74devel-ibs

Set up IBs for CMSSW_7_4_DEVEL_X
use new pkgtools tag for 74devel