Migration to consumes -- CSCSkim

Add consumes interface to DPGAnalysis/Skims/CSCSkim. This compiles fine and looks OK to me, but is untested since I have no convenient way to do it. I avoid the necessity of modifying 14 associated config files by hard-coding the InputTags for sim and real wire and strip digis required by the consumes interface. (The existing configs only contain InputTags for rechits, segments, trand-alone muons, global muons, tracks.)