refactor content_item methods
refactor content_item methods

test plan
 - specs should pass

Change-Id: I0e5253ba139913d533ab87a75ec897e9ad4e1e0c
Reviewed-on: https://gerrit.instructure.com/42923
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Nathan Mills <10b0771d20c18ad0d98c1d000665e443052b40b0@instructure.com>
Product-Review: Bracken Mosbacker <48b846001bca4166dc3fb7711563afc17525921e@instructure.com>
QA-Review: Bracken Mosbacker <48b846001bca4166dc3fb7711563afc17525921e@instructure.com>

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