LU-9258 nodemap: group quota ID not properly mapped

LU-9258 nodemap: group quota ID not properly mapped

This patch fixes a typo in which group quota IDs were mapped as user
IDs for quota commands.

Test-Parameters: trivial
Signed-off-by: Kit Westneat <kit.westneat@gmail.com>
Change-Id: I9458b4af04a3638fb8ccf3bd2a96b30305021514
Reviewed-on: https://review.whamcloud.com/26209
Tested-by: Jenkins
Reviewed-by: Stephan Thiell <sthiell@stanford.edu>
Reviewed-by: Emoly Liu <emoly.liu@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>