Improved the error message when there are too many tags in the exposure [skip hazardlib]
Improved the error message when there are too many tags in the exposure [skip hazardlib]


Former-commit-id: 1d2e3b84cf606a4c42d8a276c00903943672c115
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine