Pw/support cpu

[PrestonH2O]

Removed references to cuda in tests and CabannaController.hpp, changing memory and execution spaces. This allows serial runs so that code coverage will be able to pick up code it otherwise wouldn't due to being run on gpus.

Tested both CPU and GPU runs of this build.

[cwsmith]

@PrestonH2O Thank you. Please remove the 'Implemented testing code coverage' commit. I typically do this with a git rebase -i on the command line followed by a force push to the branch (git push origin pw/supportCPU --force). The force push is needed since we are rewriting the history of the branch.

[cwsmith]

Looks good. Thank you. There is one small change noted in my comment.