pass cookies to User#new_registration, refs CNVS-6886
pass cookies to User#new_registration, refs CNVS-6886

test plan:
N/A, see plugin commit(s)

Change-Id: Id47d8106105ca122e22ebdf26f21c7290f264c56
Reviewed-on: https://gerrit.instructure.com/22415
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Landon Wilkins <e219b0c23c4256074cdfc7a23138e4f17200b08f@instructure.com>
Product-Review: Marc LeGendre <d33c80bc45d65303e33ca83108a9952b745af9ef@instructure.com>
QA-Review: Marc LeGendre <d33c80bc45d65303e33ca83108a9952b745af9ef@instructure.com>

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