Added a sanity check on the DISPLAY_NAME dictionary [skip hazardlib][demos]
Added a sanity check on the DISPLAY_NAME dictionary [skip hazardlib][demos]


Former-commit-id: 9edb3c5dad878f9f9da229f525ab685c389dbdd5
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine