cleanup exotica fragment and PhysList code
Added callbacks to new module types for forking support

On request from HLT, I added the callbacks used by the forking mechanism.
NOTE: forking and threading should not be used together in the same job.
FTS and other config fixes for HLT in 72X
fixed tau-decay bug
Merge pull request #5118 from Martin-Grunewald/HLTFTSfixes72X

FTS and other config fixes for HLT in 72X
Merge pull request #5119 from civanch/tau-decay_and_exotica

Tau-decay crash fix and exotica cleanup
Merge pull request #5112 from Dr15Jones/enableForkingSupportForNewModuleTypes

Added callbacks to new module types for forking support
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X