Update snow filenames to comply with EE2 standards#201

CoryMartin-NOAA merged 2 commits into

NOAA-EMC:developNOAA-EMC/jcb-gdas:developfrom

DavidHuber-NOAA:feature/ee2_snowDavidHuber-NOAA/jcb-gdas:feature/ee2_snowCopy head branch name to clipboard