fix Enrollment.future scope for sqlite. fixes gh-235
fix Enrollment.future scope for sqlite. fixes gh-235

test plan:
 * run canvas on sqlite, and go to /courses page

Change-Id: Ie787d7a1c7079fc2ad08aaf6c9c9767631fe5234
Reviewed-on: https://gerrit.instructure.com/15176
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Brian Palmer <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@instructure.com>

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