added author to Entry::toJSON fixes #11815
added author to Entry::toJSON fixes #11815

test plan:
1. expand comments in a side-comment discussion
2. observe the authors don't all say "unknown"

Change-Id: Ib8392ef5d5c9a145a8812555cfbe154594b0a39c
Reviewed-on: https://gerrit.instructure.com/15328
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Ryan Shaw <ea3cd978650417470535f3a4725b6b5042a6ab59@instructure.com>

sli7246/canvas_branch,Rvor/canvas-lms,greyhwndz/canvas-lms,ShreniiNepal/shrenii_lmp,usmschuck/canvas,sfu/canvas-lms,whalejasmine/canvas-lms,antoniuslin/canvas-lms,jay3126/canvas-lms,djbender/canvas-lms,va7map/canvas-lms,leftplusrightllc/canvas-lms,kyroskoh/canvas-lms,juoni/canvas-lms,Unow/ins,HotChalk/canvas-lms,greyhwndz/canvas-lms,Rvor/canvas-lms,djbender/canvas-lms,juoni/canvas-lms,parbros/red-innovadores-lms,fronteerio/canvas-lms,usmschuck/canvas,wrdsb/canvas-lms,leftplusrightllc/canvas-lms,sfu/canvas-lms,Rvor/canvas-lms,Unow/ins,wimemx/Canvas,SwinburneOnline/canvas-lms,SwinburneOnline/canvas-lms,va7map/canvas-lms,arrivu/jigsaw-lms,samuels410/greatlakes-lms,nditech/red-innovadores-lms,whalejasmine/canvas-lms,whalejasmine/canvas-lms,arrivu/qibla-ecampus,venturehive/canvas-lms,efrj/canvas-lms,rup/Tarrax,rup/Tarrax,arrivu/jigsaw-lms,juoni/canvas-lms,ShreniiNepal/shrenii_lmp,kyroskoh/canvas-lms,landonwilkins/canvas-lms,sdeleon28/canvas-lms,sdeleon28/canvas-lms,grahamb/canvas-lms,arrivu/hoodemo,va7map/canvas-lms,Jyaasa/canvas-lms,HotChalk/canvas-lms,Jyaasa/canvas-lms,jay3126/canvas-lms,skmezanul/canvas-lms,shidao-fm/canvas-lms,jay3126/canvas-lms,wye0220/shindig-canvas,nditech/red-innovadores-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,Unow/canvas-lms,arrivu/hoodemo,fronteerio/canvas-lms,merichar/canvas-lms,skmezanul/canvas-lms,wimemx/Canvas,rup/Tarrax,sfu/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,arrivu/arrivu-lms,antoniuslin/canvas-lms,arrivu/arrivu-lms,arrivu/hoodemo,whalejasmine/canvas-lms,djbender/canvas-lms,nditech/red-innovadores-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,juoni/canvas-lms,jay3126/canvas-lms,efrj/canvas-lms,roxolan/canvas-lms,tgroshon/canvas-lms,HotChalk/canvas-lms,greyhwndz/canvas-lms,sdeleon28/canvas-lms,merichar/canvas-lms,grahamb/canvas-lms,loganrun/pincan,tgroshon/canvas-lms,utkarshx/canvas-lms,greyhwndz/canvas-lms,parbros/red-innovadores-lms,fronteerio/canvas-lms,grahamb/canvas-lms,fronteerio/canvas-lms,ShreniiNepal/shrenii_lmp,shidao-fm/canvas-lms,arrivu/qibla-ecampus,loganrun/pincan,redconfetti/canvas-lms,skmezanul/canvas-lms,wimemx/Canvas,sli7246/canvas_branch,efrj/canvas-lms,utkarshx/canvas-lms,wye0220/shindig-canvas,landonwilkins/canvas-lms,Jyaasa/canvas-lms,merichar/canvas-lms,redconfetti/canvas-lms,arrivu/arrivu-lms,wrdsb/canvas-lms,Unow/ins,arrivu/jigsaw-lms,grahamb/canvas-lms,ShreniiNepal/shrenii_lmp,va7map/canvas-lms,djbender/canvas-lms,wye0220/shindig-canvas,antoniuslin/canvas-lms,sdeleon28/canvas-lms,landonwilkins/canvas-lms,Jyaasa/canvas-lms,leftplusrightllc/canvas-lms,tgroshon/canvas-lms,redconfetti/canvas-lms,utkarshx/canvas-lms,wrdsb/canvas-lms,samuels410/greatlakes-lms,roxolan/canvas-lms,Rvor/canvas-lms,usmschuck/canvas,Unow/canvas-lms,parbros/red-innovadores-lms,roxolan/canvas-lms,venturehive/canvas-lms,sli7246/canvas_branch,skmezanul/canvas-lms,wrdsb/canvas-lms,samuels410/greatlakes-lms,nditech/red-innovadores-lms,tgroshon/canvas-lms,shidao-fm/canvas-lms,utkarshx/canvas-lms,grahamb/canvas-lms,kyroskoh/canvas-lms,sfu/canvas-lms,Unow/canvas-lms,antoniuslin/canvas-lms,efrj/canvas-lms,venturehive/canvas-lms,roxolan/canvas-lms,shidao-fm/canvas-lms,kyroskoh/canvas-lms,usmschuck/canvas,redconfetti/canvas-lms,loganrun/pincan,arrivu/qibla-ecampus,landonwilkins/canvas-lms,leftplusrightllc/canvas-lms,samuels410/greatlakes-lms