Merge pull request #334 from scottaiton/unit_test_memory_leaks #871

Job	Run time
CMake build on MacOS	7m 40s
CMake Serial Minimal Build on Linux	55s
CMake Serial With Clawpack Build on Linux	6m 55s
CMake Serial With Clawpack and HDF Build on Linux	7m 58s
CMake Serial With GeoClaw Build on Linux	1m 8s
CMake Serial With CudaClaw (CUDA 10.1) Build on Linux	3m 29s
CMake Serial With CudaClaw (CUDA 11.3) Build on Linux	3m 50s
CMake MPI Minimal Build on Linux	1m 10s
CMake MPI With Clawpack Build on Linux	7m 25s
CMake MPI With Clawpack and HDF Build on Linux	8m 19s
CMake MPI With GeoClaw Build on Linux	2m 8s
CMake MPI With CudaClaw (CUDA 10.1) Build on Linux	3m 58s
CMake MPI With CudaClaw (CUDA 11.3) Build on Linux	4m 51s
CMake MPI With ThunderEgg Build on Linux	3m 47s
	1h 3m 33s

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