extend the AOD content for EXO Long-Lived needs

This is a pull request to test the changes discussed during the "Scouting Parking & Hotline" workshop.
Regarding the possibility to extend the AOD content to include dE/dx information associated to highPt Tracks as well as the Muon segments (DT and CSC) and hits (RPC).
Instead of creating at least 3 new skims for the EXO Long-Lived searches.

This PR is meant to allow @StoyanStoynev and @slava77 to see what are the proposed changes and to study their impact on the reconstruction and disk space
Automatically ported from CMSSW_7_3_X #6532
Similar comments to the vectors as well.
Are they supposed to be synchronized in some way?
Apparently detid will be stored twice if that's the key. Can there be more than one cluster per detid?
There should be some methods in place to keep these 3 vectors in sync.

In any case, the vectors should not be public. 
Please encapsulate with corresponding access and modifier methods.