Avoid aborting mdrun when GPU sanity check detects errors

Avoid aborting mdrun when GPU sanity check detects errors

A release assertion was added which assumed that the GPU
compatibility/sanity checks return with a clean CUDA API state.
Consequently, any run that encountered a non-success return value from
the CUDA API would abort the run instead of continuing the run without
using the GPU in question.
This change adds code to handle and issue a note on the error
encountered as well as ensures that the CUDA API error state cleared
at the return of the GPU detection.

Fixes #2415

Change-Id: I5d7ed59ef8e4052a75b51c9a526b8dcb465ff611