Update Fill Descriptions Methods for L1T Producers

[mulhearn]

@z4027163 you are the point man for this desk.

We need to update the fillDescriptions methods throughout L1T modules so that we get sensible debugging output when parameters are left unset by users.

[mulhearn]

Start with these violators:
mulhearn@lxplus0047>grep setUnknown L1Trigger/L1TCalorimeter/plugins/*
L1Trigger/L1TCalorimeter/plugins/L1TCaloRCTToUpgradeConverter.cc: desc.setUnknown();
L1Trigger/L1TCalorimeter/plugins/L1TCaloStage1LutWriter.cc: desc.setUnknown();
L1Trigger/L1TCalorimeter/plugins/L1TPhysicalEtAdder.cc: desc.setUnknown();
L1Trigger/L1TCalorimeter/plugins/L1TStage1Layer2Producer.cc: desc.setUnknown();
L1Trigger/L1TCalorimeter/plugins/L1TStage2CaloAnalyzer.cc: desc.setUnknown();
L1Trigger/L1TCalorimeter/plugins/L1TStage2InputPatternWriter.cc: desc.setUnknown();
L1Trigger/L1TCalorimeter/plugins/L1TStage2Layer1Producer.cc: desc.setUnknown();
L1Trigger/L1TCalorimeter/plugins/L1TStage2Layer2Producer.cc: desc.setUnknown();

[z4027163]

@mulhearn Got it

[z4027163]

Working on
https://github.com/cms-l1t-offline/cmssw/tree/l1t-filldesc-CMSSW_7_6_0_pre6

[z4027163]

What does the second half in the brace mean when I add the description?
Like
desc.addedm::InputTag("InputCollection",edm::InputTag("caloStage1Digis"));
desc.addedm::InputTag("InputRlxTauCollection",edm::InputTag("caloStage1Digis:rlxTaus"));

Does that mean the default value? Is there any requirement on the name? Or any name I come up with?

Also for std::string, do I set 0 to be the second half in the brace? like
desc.addstd::string("conditionsLabel",0);