Jazzy testing

[ndunkelb-nasa]

There are two things going on in migrating to jazzy -

• Several repos moving to .hpp files instead of .h files. I don't know if these will be backwards compatible to humble... so not sure if we need separate branches here? Ill take a look
• Was having some issues compiling a dependency (MPI). It seems like maybe they didn't expose their dependencies correctly? I'm not really sure I understand why this is necessary, but this seemed to resolve the issues I was having...

[ndunkelb-nasa]

I'm sad to say the .h vs .hpp changes are not backwards compatible. Maybe we do some compile time checking for the proper header version?

[eholum-nasa]

It builds at least!

[eholum-nasa]

Re-approving since I also sanity checked the build on jazzy.