set account object not just id to avoid later lookup in Pseudonym#validate_unique_id
set account object not just id to avoid later lookup in Pseudonym#validate_unique_id

refs #3752

Change-Id: Ice950e03c1b6f226bb24d7b9f23ffb0042dba3eb
Reviewed-on: https://gerrit.instructure.com/3555
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>

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