fix uri building in User.avatar_fallback_url
fix uri building in User.avatar_fallback_url

Uri#port doesn't take a string anymore

Change-Id: Ieb0c0bf27f6e29bbe5c7d6acfefaa12c58a4ede7
Reviewed-on: https://gerrit.instructure.com/29757
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Liz Abinante <ce3305c9be70e1a5a9ff49df19e1a5b24d5a47f8@instructure.com>
Product-Review: Cameron Matheson <1d572acbfa68c7c6e541c7b840d6b622e5c0dc91@instructure.com>
QA-Review: Cameron Matheson <1d572acbfa68c7c6e541c7b840d6b622e5c0dc91@instructure.com>

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