Do not throw an exception when ROOT reports a missing dictionary problem

In the case where ROOT prints a message about a missing collection
proxy we no longer throw an exception. This was needed to handle the
case of reading an old file using a release for which a class in that
file no longer exists. The framework doesn't need the exception since
it has other ways of detecting the missing dictionary and then take
appropriate action.

FWCore/Services/src/InitRootHandlers.cc

@@ -124,6 +124,9 @@ namespace {
           (el_message.find("already in TClassTable") != std::string::npos) ||
           (el_message.find("matrix not positive definite") != std::string::npos) ||
           (el_message.find("not a TStreamerInfo object") != std::string::npos) ||
+	  //This deals with a missing dictionary problem
+	  ( (el_message.find("Collection proxy for") !=std::string::npos && 
+	     el_message.find("was not properly initialized!") != std::string::npos)) ||
           (el_location.find("Fit") != std::string::npos) ||
           (el_location.find("TDecompChol::Solve") != std::string::npos) ||
           (el_location.find("THistPainter::PaintInit") != std::string::npos) ||