Update MODULEPATH for Orion (#1126)

New hpc-stack location on Orion managed by Hang Lei:
/apps/contrib/NCEP/hpc-stack/libs/hpc-stack/modulefiles/stack

Refs #1119

Author: KateFriedman-NOAA

modulefiles/module_base.orion.lua

@@ -2,7 +2,7 @@ help([[
 Load environment to run GFS on Orion
 ]])
 
-prepend_path("MODULEPATH", "/apps/contrib/NCEP/libs/hpc-stack/modulefiles/stack")
+prepend_path("MODULEPATH", "/apps/contrib/NCEP/hpc-stack/libs/hpc-stack/modulefiles/stack")
 
 load(pathJoin("hpc", "1.1.0"))
 load(pathJoin("hpc-intel", "2018.4"))