Use class type_info, rather than class name, for dictionary checking

[wmtan]

When checking for a class dictionary, use the std::type_info of the class, rather than the name of the class. This makes the checking independent of naming conventions, and also reduces string demangling and other string manipulations.
This pull request also changes the obsolete "gROOT->GetClass()" to the preferred equivalent, "TClass::GetClass()", in the framework.
Please merge this pull request as soon as convenient.

[cmsbuild]

A new Pull Request was created by @wmtan for CMSSW_7_3_ROOT6_X.

Use class type_info, rather than class name, for dictionary checking

It involves the following packages:

DataFormats/Common
DataFormats/Provenance
FWCore/FWLite
FWCore/Framework
FWCore/RootAutoLibraryLoader
FWCore/Utilities
IOPool/Common
IOPool/Input
IOPool/Output
IOPool/Streamer

@cmsbuild, @Dr15Jones, @ktf, @nclopezo can you please review it and eventually sign? Thanks.
@wddgit this is something you requested to watch as well.
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