Dakota batch interface

[pjb236]

Added a dakota batch coupler and some new model methods it needs. Current implementation assumes Flux is being used, this might have to change.

[eparish1]

@pjb236 I think we should move this to the sparc-tools repository due to the implicit assumption on flux as well as the requirement for dakota python interface. In particular, the latter will fail all the tests unless we add its install as part of the pyproject, and I don't believe this is possible currently. Thoughts?

[pjb236]

@pjb236 I think we should move this to the sparc-tools repository due to the implicit assumption on flux as well as the requirement for dakota python interface. In particular, the latter will fail all the tests unless we add its install as part of the pyproject, and I don't believe this is possible currently. Thoughts?

Yeah, I think this makes sense. Are you thinking of moving all changes or just dakota_batch_coupler.py?

[pjb236]

@eparish1 I was able to move the batch coupler, but I've kept the changes to the model interface here for now. I would have to duplicate definitions of these functions multiple places in the sparc model interfaces, which I could do, but is not the most elegant way to implement it.