ensure analysis code runs in 7_0_X

 - gcc 4.8.1 doesn't like the variadic template syst_map construction in
   CombineTools. But apparently the same function as a static class
   method of SystMap is just fine, so switch to this
 - gcc 4.8.1 kicks up a few new warnings, fix most of these
 - move the SVFitService code from Utilities to HiggsTauTau so we don't block
   other packages that depend on Utilities from compiling in a base
   release. Propagate updated includes everywhere