fix gradebook loading bug
fix gradebook loading bug

Change-Id: I0aaab22e2869451bdf4ccf7613d2027a61d06a32
Reviewed-on: https://gerrit.instructure.com/2571
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Zach Wily <9de8c4480303b5335cd2a33eefe814615ba3612a@instructure.com>

instructure/canvas-lms,Unow/ins,utkarshx/canvas-lms,Rvor/canvas-lms,landonwilkins/canvas-lms,snehakachroo1/LSI_replica,fronteerio/canvas-lms,arrivu/arrivu-lms,arrivu/hiring-site,arrivu/hoodemo,dgynn/canvas-lms,greyhwndz/canvas-lms,venturehive/canvas-lms,faraazkhan/canvas,greyhwndz/canvas-lms,arrivu/hiring-site,grahamb/canvas-lms,roxolan/canvas-lms,Unow/ins,wye0220/shindig-canvas,arrivu/jigsaw-lms,ankithbti/canvas_lms,sfu/canvas-lms,sdeleon28/canvas-lms,jay3126/canvas-lms,jay3126/canvas-lms,wimemx/Canvas,whalejasmine/canvas-lms,dgynn/canvas-lms,faraazkhan/canvas,rup/Tarrax,va7map/canvas-lms,sfu/canvas-lms,antoniuslin/canvas-lms,antoniuslin/canvas-lms,skmezanul/canvas-lms,loganrun/pincan,samuels410/greatlakes-lms,faraazkhan/canvas,arrivu/jigsaw-lms,gbleydon/canvas-lms,jay3126/canvas-lms,narigone/canvas,samuels410/greatlakes-lms,icelab/canvas,Jyaasa/canvas-lms,parbros/red-innovadores-lms,tgroshon/canvas-lms,wimemx/Canvas,sdeleon28/canvas-lms,samuels410/greatlakes-lms,instructure/canvas-lms,snehakachroo1/LSI_replica,venturehive/canvas-lms,skmezanul/canvas-lms,ankithbti/canvas_lms,ShreniiNepal/shrenii_lmp,parbros/red-innovadores-lms,shidao-fm/canvas-lms,Unow/canvas-lms,loganrun/pincan,ottenhoff/canvas-lms,SwinburneOnline/canvas-lms,ShreniiNepal/shrenii_lmp,HotChalk/canvas-lms,whalejasmine/canvas-lms,eCNAP/CANVAS,roxolan/canvas-lms,jay3126/canvas-lms,Unow/ins,instructure/canvas-lms,nditech/red-innovadores-lms,grahamb/canvas-lms,greyhwndz/canvas-lms,Jyaasa/canvas-lms,sdeleon28/canvas-lms,icelab/canvas,roxolan/canvas-lms,redconfetti/canvas-lms,djbender/canvas-lms,va7map/canvas-lms,kyroskoh/canvas-lms,efrj/canvas-lms,grahamb/canvas-lms,usmschuck/canvas,juoni/canvas-lms,arrivu/qibla-ecampus,wimemx/Canvas,Rvor/canvas-lms,utkarshx/canvas-lms,matematikk-mooc/canvas-lms,SwinburneOnline/canvas-lms,Unow/canvas-lms,efrj/canvas-lms,em2/canvas-lms,utkarshx/canvas-lms,wrdsb/canvas-lms,nditech/red-innovadores-lms,va7map/canvas-lms,tgroshon/canvas-lms,arrivu/qibla-ecampus,ottenhoff/canvas-lms,wye0220/shindig-canvas,merichar/canvas-lms,landonwilkins/canvas-lms,narigone/canvas,merichar/canvas-lms,arrivu/hoodemo,ottenhoff/canvas-lms,venturehive/canvas-lms,arrivu/hoodemo,instructure/canvas-lms,AndranikMarkosyan/lms,arrivu/arrivu-lms,arrivu/jigsaw-lms,grahamb/canvas-lms,eCNAP/CANVAS,usmschuck/canvas,redconfetti/canvas-lms,narigone/canvas,AndranikMarkosyan/lms,whalejasmine/canvas-lms,HotChalk/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,rup/Tarrax,em2/canvas-lms,arrivu/qibla-ecampus,usmschuck/canvas,rup/Tarrax,juoni/canvas-lms,leftplusrightllc/canvas-lms,wrdsb/canvas-lms,landonwilkins/canvas-lms,instructure/canvas-lms,whalejasmine/canvas-lms,matematikk-mooc/canvas-lms,nditech/red-innovadores-lms,ankithbti/canvas_lms,icelab/canvas,samuels410/greatlakes-lms,shidao-fm/canvas-lms,Unow/canvas-lms,greyhwndz/canvas-lms,kyroskoh/canvas-lms,efrj/canvas-lms,sfu/canvas-lms,loganrun/pincan,roxolan/canvas-lms,sli7246/canvas_branch,sfu/canvas-lms,AndranikMarkosyan/lms,djbender/canvas-lms,arrivu/arrivu-lms,SwinburneOnline/canvas-lms,landonwilkins/canvas-lms,sfu/canvas-lms,tgroshon/canvas-lms,juoni/canvas-lms,wye0220/shindig-canvas,matematikk-mooc/canvas-lms,kyroskoh/canvas-lms,sfu/canvas-lms,merichar/canvas-lms,sdeleon28/canvas-lms,parbros/red-innovadores-lms,leftplusrightllc/canvas-lms,skmezanul/canvas-lms,wrdsb/canvas-lms,Rvor/canvas-lms,SwinburneOnline/canvas-lms,efrj/canvas-lms,snehakachroo1/LSI_replica,em2/canvas-lms,shidao-fm/canvas-lms,skmezanul/canvas-lms,leftplusrightllc/canvas-lms,utkarshx/canvas-lms,dgynn/canvas-lms,grahamb/canvas-lms,Rvor/canvas-lms,HotChalk/canvas-lms,sli7246/canvas_branch,djbender/canvas-lms,instructure/canvas-lms,antoniuslin/canvas-lms,fronteerio/canvas-lms,snehakachroo1/LSI_replica,gbleydon/canvas-lms,fronteerio/canvas-lms,eCNAP/CANVAS,shidao-fm/canvas-lms,HotChalk/canvas-lms,redconfetti/canvas-lms,venturehive/canvas-lms,leftplusrightllc/canvas-lms,Jyaasa/canvas-lms,kyroskoh/canvas-lms,AndranikMarkosyan/lms,arrivu/hiring-site,antoniuslin/canvas-lms,wrdsb/canvas-lms,narigone/canvas,usmschuck/canvas,ShreniiNepal/shrenii_lmp,fronteerio/canvas-lms,sli7246/canvas_branch,nditech/red-innovadores-lms,gbleydon/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,ShreniiNepal/shrenii_lmp,va7map/canvas-lms,Jyaasa/canvas-lms,eCNAP/CANVAS,tgroshon/canvas-lms,redconfetti/canvas-lms,juoni/canvas-lms,dgynn/canvas-lms