gb1: don't call assignment_json in slave block
gb1: don't call assignment_json in slave block

fixes CNVS-3765

assignment_json may write to the db when module progression is
configured

Change-Id: If0f807dc390ab1ab6fd46c4de62a65195e133b18
Reviewed-on: https://gerrit.instructure.com/17624
Reviewed-by: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
QA-Review: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>

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