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
yes, I'm expecting a fillHit or addHit method.

I can naively expect that for every entry in DeDxHitInfoContainer there is only one entry either in SiStripCluster or in SiPixelCluster.
If that's the case, then we can enforce some alignment and have pixelClusters first and then stripClusters.
Could you please describe the relationship between these vectors, maybe better by email, since like comments will be harder to get from github