tests/utils/helpers:
tests/utils/helpers:

Modified `get_hazard_job` to refresh the HazardCalculation object,
which guarantees that all of the fields will be normalized.

This fixes subtle bugs with the interpretation of 'string list'
type config file parameters, such as `quantile_hazard_curves`.

gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine