log the entire SAMLResponse text
log the entire SAMLResponse text

When using syslog, you have a line limit of a couple kb, so the SAMLResponse
usually gets truncated when logging parameters. This will split it up into 1kb
chunks so you can reconstruct it from logs alone.

test plan: attempt a login via saml - it should work, and you should see the
split up SAMLResponse in your log

Change-Id: I33841280194b8ae2e2e9133d02c44b124dc1f106
Reviewed-on: https://gerrit.instructure.com/10715
Reviewed-by: Bracken Mosbacker <48b846001bca4166dc3fb7711563afc17525921e@instructure.com>
Tested-by: Zach Wily <9de8c4480303b5335cd2a33eefe814615ba3612a@instructure.com>

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