Expand error message when OBC files are missing#851

Hallberg-NOAA merged 3 commits into

NOAA-GFDL:dev/gfdlNOAA-GFDL/MOM6:dev/gfdlfrom

theresa-cordero:add_to_obc_error_messagetheresa-cordero/MOM6:add_to_obc_error_messageCopy head branch name to clipboard