Implement EEE and/or MVA sensitivity analysis

[richardarsenault]

Two new sensitivity analysis methods have been developed and we would want to add them to the platform. EEE and MVA are developed already and should be implemented in the platform and tested.

[julemai]

• EEE is a sensitivity method to identify informative parameters with a minimal number of model runs (might be helpful pre-calibration)
• MVA is a method to estimate the uncertainty of sensitivity estimates (so far Sobol' and PAWN implemented) without the necessity of additional model runs or bootstrapping

We might want to implement the Morris method (easy since EEE is based on that), Sobol' and PAWN (both easy since part of the MVA package) method as well as such that users have a selection of methods they could perform. All these methods (except EEE and MVA) are computationally really expensive.

The plan is to implement them in OSTRICH such that we don't have to maintain the interfacing with raven but can build everything based on the current OSTRICH interface.