Reduced the precision when exporting the loss curves in CSV
Reduced the precision when exporting the loss curves in CSV


Former-commit-id: f7cc7e71099c882d58977bc08e14c8afb0d848f1 [formerly f7a6582b20aaa3c67ae82f36719fd06e3396cbec]
Former-commit-id: 70e113a815c5c3f2b8fd5622d70363ad87e65d0d
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine