update saml gem to allow shiboleth logins
update saml gem to allow shiboleth logins

Change-Id: I83d013867464f18f3bee805799ea0c0a060b0512
Reviewed-on: https://gerrit.instructure.com/4352
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>

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