fix race conditions in wiki selenium specs
fix race conditions in wiki selenium specs

test plan: n/a

Change-Id: Ife5b0cba255ccc5a5aff419ca9ea886afb33d818
Reviewed-on: https://gerrit.instructure.com/7296
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>

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