Fix spelling error in DMUDT000 routine commands

The OS check to determine if the Interactive Date tests can be run is
using an incorrectly spelled command, leading to an "<UNDEFINED>" error.

Change the "ZSOF" to the correct "ZOSF"

OSEHRA-Id: http://issues.osehra.org/browse/OAT-106
Change-Id: Ifd3d245412b3702f05cb7d9ffc7d77ab6f96da4c
Merge "Fix spelling error in DMUDT000 routine commands"