include groups in .../files?show_all_contexts=1
include groups in .../files?show_all_contexts=1

get_all_pertinent_contexts takes one parameter, include_groups, which
defaults to false. fixes #5777

Change-Id: I412249a180a4325b59ee69020f675f015059c191
Reviewed-on: https://gerrit.instructure.com/5880
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Reviewed-by: Brian Whitmer <760e7dab2836853c63805033e514668301fa9c47@instructure.com>

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