fixes inconsistencies in sis csv documentation
fixes inconsistencies in sis csv documentation

canvas sis imports do not have default values
all date time fields should be in ISO 8601
moved if a field is required to description

Change-Id: Ifead275fb789384a80542ee7a9ac370c38c01194
Reviewed-on: https://gerrit.instructure.com/15973
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Cody Cutrer <c4fe2b1d90ef8f2548c8aeabfa633434316f0305@instructure.com>
QA-Review: Dave Jungst <bfcdf3e6ca6cef45543bfbb57509c92aec9a39fb@instructure.com>

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