[rattr] do not generate streamer infos for RAttrValue classes
[rattr] do not generate streamer infos for RAttrValue classes

All these classes provide only access to RAttrMap, but should never
be stored in the ROOT files
olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root,olifre/root