discussions: fix reply permissions disagreement
discussions: fix reply permissions disagreement

fixes CNVS-12950

test plan:

- create an unpublished discussion
- you should not see a reply textarea

Change-Id: Ib7dfc22df75f025c548f59bd5f3e3d18fa338cd2
Reviewed-on: https://gerrit.instructure.com/36249
Reviewed-by: Joel Hough <4816dabf8db1bc6cac35b3a24cab2ff844b5b0c7@instructure.com>
QA-Review: Steven Shepherd <e794458448443812fb2685675aab3bbd1a3891bc@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Product-Review: Drew Bowman <43bd25f9469d5056946537962fe98ec04e66c401@instructure.com>

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