Strip clusters back to 70X

Backport #2466 (by @VinInn) into 70X, so that it can be used for HLT templates and menus.
According to the original description, there are two Major components here:
1) Speed up of a factor two of the Strip Clusterizer
2) new infrastructure based on edmNew::DetSetVector for the OnDemand tracking
this version is fully backward compatible and support both old and new mechanisms
for reco and hlt.

@Martin-Grunewald