METL-577: Added D2L username as MeTL student id, for rows which are enrolled with no attendance.  This makes the ones that have purely numeric D2L ids human readable.
METL-577: Added D2L username as MeTL student id, for rows which are enrolled with no attendance.  This makes the ones that have purely numeric D2L ids human readable.

StackableRegiments/analyticalmetlx,StackableRegiments/analyticalmetlx,StackableRegiments/analyticalmetlx,StackableRegiments/analyticalmetlx