Add RefToBase member `holder_' as transient in Reflex dicts.

RefToBase is a templated class with a private memeber holder_ of
reftobase::BaseHolder<value_type>* type. The following type is
not part of any dictionary, thus holder_ is not saved.

Example error generated by ROOT:

Error in <TStreamerInfo::Build:>: edm::RefToBase<reco::Electron>:
edm::reftobase::BaseHolder<reco::Electron>* has no streamer or
dictionary, data member holder_ will not be saved

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
Add edm::reftobase::BaseHolder<*> type into a dictionary.

The following is needed for edm::RefToBase<*>, to store holder_
data member.

From Dr15Jones:
  holder_ must be stored since it holds all the information we need
  to retrieve the data. BaseHolder is an abstract base class but its
  concrete implementations ultimately hold an edm::Ref which must be
  stored

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
EfficiencyVsTrueSeparation
EfficiencyVsTrueSeparation
EfficiencyVsTrueSeparation
Modified catch statement to edm::Exception
Each module is assigned its own unique ID which is accessible via its edm::ModuleDescription. The id is assigned in a thread safe manner.
From normal vectors to const &
From normal vectors to const &
Add function to calculate ID of empty parameter set without registering it
Unit test extension for context classes

Extend existing unit tests to cover the
content of the context classes as they are
passed to the services in the callback
functions.
Merge pull request #280 from wmtan/calculateIDofEmptyParameterSet

Add function to calculate ID of empty parameter set without registering ...
Switch to LogInfo when GEM geometry is missing. It's valid for current detector.
Merge pull request #285 from ianna/gem-geometry-no-warning-if-missing

Switch to LogInfo when GEM geometry is not defined
Merge branch 'CMSSW_7_0_X' of https://github.com/cms-sw/cmssw into unitTestServiceContexts
Drop CVS keywords from DQM.
Merge pull request #59 from davidlt/dict-fix-RefToBase-holder_

[RFC] Add RefToBase member `holder_'  in Reflex dicts.
Fix new unit test by removing release name from test comparison.
Merge branch 'CMSSW_7_0_X' of https://github.com/cms-sw/cmssw into unitTestServiceContexts
Fixed a merge conflict from white space differences compared to pull request #272

Conflicts:
	FWCore/Framework/test/event_getrefbeforeput_t.cppunit.cc
	FWCore/Framework/test/generichandle_t.cppunit.cc