spec: fix sub-second precision bug in assignment_spec
spec: fix sub-second precision bug in assignment_spec

Change-Id: I1c49cc205bae79c62e8fe9067fc704f7f33fd373
Reviewed-on: https://gerrit.instructure.com/14535
Reviewed-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>

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