jet hypo - technical changes

1. chainPart dictionaries have a key/value  "prefilters"/list. One of the
possible entries has prefix "prefilter". Change this to "mask". This affects
chain names, and reference files for the trigger ART tests have been updated.

      TrigHLTJetHypo/python/prefilter_mask.py
      TrigHLTJetHypo/python/scenario_simple.py
      TrigHLTJetHypo/python/test_hypoConfigBuilder.py
      TrigAnalysisTest/share/ref_RDOtoRDOTrig_v1Dev_build.ref
      TriggerTest/share/ref_data_v1Dev_build.ref
      TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1.py
      TriggerMenuMT/python/HLTMenuConfig/Menu/SignatureDicts.py

2. Remove the share directory. Remove references to this directory from CMakeLists.txt

   TrigHypothesis/TrigHLTJetHypo/CMakeLists.txt
   TrigHLTJetHypo/share/dummy.txt

3. jets passing hypo cuts are reported according to the chain part that specifies
those cuts. Recently, the 'chainPartIndex' key was added to the chainPart dictionary.
Use this index, rather than claculating an index from an offset + poition of the chainPart
dictionary in the chainDict['chainParts'] list.

	   TrigHypothesis/TrigHLTJetHypo/python/hypoConfigBuilder.py