include deprecated saml assertionconsumerservice in metadata
include deprecated saml assertionconsumerservice in metadata

fixes CNVS-20576

and prefer it make it first, so that we prefer it, so that IdPs
won't freak out about us asking for a new url before they've
refreshed their metadata

test plan:
 * saml metadata should include both old and new routes
 * watching network requests for a saml login, it should go to
   /saml_login

Change-Id: I3fe4766508b9c10425a716759764ad77673d13eb
Reviewed-on: https://gerrit.instructure.com/55037
Tested-by: Jenkins
Reviewed-by: Jacob Fugal <f862f167b85d41b225785c70d70808bc7337c1fe@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Product-Review: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>

sfu/canvas-lms,sdeleon28/canvas-lms,grahamb/canvas-lms,Rvor/canvas-lms,tgroshon/canvas-lms,kyroskoh/canvas-lms,antoniuslin/canvas-lms,utkarshx/canvas-lms,ShreniiNepal/shrenii_lmp,shidao-fm/canvas-lms,greyhwndz/canvas-lms,venturehive/canvas-lms,whalejasmine/canvas-lms,skmezanul/canvas-lms,skmezanul/canvas-lms,antoniuslin/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,utkarshx/canvas-lms,jay3126/canvas-lms,HotChalk/canvas-lms,juoni/canvas-lms,fronteerio/canvas-lms,sdeleon28/canvas-lms,djbender/canvas-lms,Jyaasa/canvas-lms,ShreniiNepal/shrenii_lmp,kyroskoh/canvas-lms,fronteerio/canvas-lms,wrdsb/canvas-lms,skmezanul/canvas-lms,SwinburneOnline/canvas-lms,sdeleon28/canvas-lms,tgroshon/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,leftplusrightllc/canvas-lms,Rvor/canvas-lms,antoniuslin/canvas-lms,sfu/canvas-lms,whalejasmine/canvas-lms,redconfetti/canvas-lms,SwinburneOnline/canvas-lms,shidao-fm/canvas-lms,efrj/canvas-lms,skmezanul/canvas-lms,venturehive/canvas-lms,kyroskoh/canvas-lms,efrj/canvas-lms,utkarshx/canvas-lms,HotChalk/canvas-lms,va7map/canvas-lms,grahamb/canvas-lms,juoni/canvas-lms,HotChalk/canvas-lms,jay3126/canvas-lms,whalejasmine/canvas-lms,tgroshon/canvas-lms,kyroskoh/canvas-lms,wrdsb/canvas-lms,fronteerio/canvas-lms,wrdsb/canvas-lms,tgroshon/canvas-lms,Jyaasa/canvas-lms,leftplusrightllc/canvas-lms,shidao-fm/canvas-lms,juoni/canvas-lms,efrj/canvas-lms,redconfetti/canvas-lms,venturehive/canvas-lms,fronteerio/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,va7map/canvas-lms,redconfetti/canvas-lms,va7map/canvas-lms,SwinburneOnline/canvas-lms,jay3126/canvas-lms,jay3126/canvas-lms,sdeleon28/canvas-lms,juoni/canvas-lms,utkarshx/canvas-lms,wrdsb/canvas-lms,roxolan/canvas-lms,whalejasmine/canvas-lms,leftplusrightllc/canvas-lms,venturehive/canvas-lms,leftplusrightllc/canvas-lms,shidao-fm/canvas-lms,antoniuslin/canvas-lms,Jyaasa/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,Rvor/canvas-lms,ShreniiNepal/shrenii_lmp,greyhwndz/canvas-lms,Rvor/canvas-lms,va7map/canvas-lms,grahamb/canvas-lms,Jyaasa/canvas-lms,djbender/canvas-lms,ShreniiNepal/shrenii_lmp,efrj/canvas-lms,greyhwndz/canvas-lms,greyhwndz/canvas-lms,redconfetti/canvas-lms,roxolan/canvas-lms