update content zipper to use attachment#open
update content zipper to use attachment#open

closes #4355

Change-Id: I8fe18d52c91c33f96c9e55d34a02b5461263f1ac
Reviewed-on: https://gerrit.instructure.com/3877
Reviewed-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>

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