Revert "Revert "Switching default tau MVA input to ConfDB""

This reverts commit 2208d7537baf58cc52de24bb418586500a47fd31.
removed all references to root input files and moved them to auxiliary function. Protections for invalid python cfg added.
HLTJetTagWithMatching
Adding fillDescription method to CaloTowerCreatorForTauHLT module
Adding fillDescription method to L1HLTTauMatching module
Adding fillDescription method to L2TauJetsMerger module
Adding fillDescription method to L2TauPixelIsoTagProducer module
Adding fillDescription method to TauJetSelectorForHLTTrackSeeding module
Adding fillDescription method to VertexFromTrackProducer module
Merge pull request #6985 from silviodonato/HLTJetTagWithMatching

HLTJetTagWithMatching
Merge pull request #6997 from mbluj/fillDescriptionUpdate

Fill description update
Merge remote branch 'origin/CMSSW_7_4_X' into CMSSW_7_0_X
Merge pull request #6949 from jpavel/740p2_taus_switchConfDB

Switching default tau MVA input to ConfDB (attempt 2)
Merge remote branch 'origin/CMSSW_7_4_X' into CMSSW_7_0_X
Merge pull request #7002 from wmtan/HidePropertyMask

Don't expose TypeWithDict property mask
Remove obsolete build file
Merge pull request #7004 from wmtan/RemoveObsoleteBuildFile

Remove obsolete build file
Don't use TType for pointer types