Change prod-util module to prod_util (#794)#798

climbfuji merged 1 commit intoJCSDA:release/1.5.1JCSDA/spack-stack:release/1.5.1from

AlexanderRichert-NOAA:produtil_151AlexanderRichert-NOAA/spack-stack:produtil_151Copy head branch name to clipboard