Add BMI metadata for PSUADE MOAT method

[mdpiper]

Dakota's PSUADE MOAT method was added to dakotathon with #61. However, it needs BMI metadata for it to become fully integrated into the dakotathon component, and callable from PyMT.

[mdpiper]

@kbarnhart I can do this, since it's mostly relevant for PyMT and WMT. I may ask you questions about the method if I can't figure stuff out from the Dakota docs.

[kbarnhart]

@mdpiper sounds good. Let me know when/if you have questions. Happy to help.