don't set val to the value of the block in keep_trying_until
don't set val to the value of the block in keep_trying_until

this broke the behavior of raising if the block never returns true-ish
before the timeout

Change-Id: I925e515ed7376cc40889435a217a4faee1c9adc5
Reviewed-on: https://gerrit.instructure.com/5677
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>

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