Risk Probabilistic Event Based Calculator - QA Test

This is the first pass of the implementation of a new test suite for probabilistic risk calculators.

Currently, it just checks only the "individual" loss curves for different cost types. It lacks tests for:

*) statistical outputs (mean loss curves, quantile loss curves)
*) loss maps
*) insured loss curves
*) occupants losses
*) population losses
*) event loss table, aggregate loss curve
*) disaggregation by distance / rupture magnitude