Switch to unordered xml because the variables are not always in the same order.
Switch to unordered xml because the variables are not always in the same order.

Closes #476

joshua-cogliati-inl/raven,joshua-cogliati-inl/raven,idaholab/raven,joshua-cogliati-inl/raven,idaholab/raven,joshua-cogliati-inl/raven,joshua-cogliati-inl/raven,joshua-cogliati-inl/raven,idaholab/raven,idaholab/raven,idaholab/raven,joshua-cogliati-inl/raven,idaholab/raven,idaholab/raven