Bug 1125850 - Use a pre-task to acquire the render lock for the render_stale_documents task.
Bug 1125850 - Use a pre-task to acquire the render lock for the render_stale_documents task.

This should prevent stale chords as a result of a previously acquired memcache lock.

mozilla/kuma,openjck/kuma,Elchi3/kuma,safwanrahman/kuma,biswajitsahu/kuma,whip112/Whip112,MenZil/kuma,RanadeepPolavarapu/kuma,carnell69/kuma,SphinxKnight/kuma,safwanrahman/kuma,tximikel/kuma,robhudson/kuma,jezdez/kuma,varunkamra/kuma,jgmize/kuma,safwanrahman/kuma,tximikel/kuma,openjck/kuma,mozilla/kuma,nhenezi/kuma,scrollback/kuma,varunkamra/kuma,FrankBian/kuma,surajssd/kuma,openjck/kuma,jgmize/kuma,ronakkhunt/kuma,cindyyu/kuma,MenZil/kuma,chirilo/kuma,bluemini/kuma,hoosteeno/kuma,davehunt/kuma,robhudson/kuma,groovecoder/kuma,carnell69/kuma,jezdez/kuma,YOTOV-LIMITED/kuma,safwanrahman/kuma,tximikel/kuma,jezdez/kuma,davehunt/kuma,carnell69/kuma,RanadeepPolavarapu/kuma,SphinxKnight/kuma,anaran/kuma,surajssd/kuma,surajssd/kuma,chirilo/kuma,SphinxKnight/kuma,tximikel/kuma,a2sheppy/kuma,SphinxKnight/kuma,jwhitlock/kuma,chirilo/kuma,biswajitsahu/kuma,YOTOV-LIMITED/kuma,whip112/Whip112,groovecoder/kuma,YOTOV-LIMITED/kuma,cindyyu/kuma,anaran/kuma,varunkamra/kuma,yfdyh000/kuma,a2sheppy/kuma,bluemini/kuma,bluemini/kuma,davehunt/kuma,utkbansal/kuma,chirilo/kuma,bluemini/kuma,bluemini/kuma,YOTOV-LIMITED/kuma,robhudson/kuma,darkwing/kuma,Elchi3/kuma,nhenezi/kuma,FrankBian/kuma,jgmize/kuma,ollie314/kuma,MenZil/kuma,jgmize/kuma,MenZil/kuma,safwanrahman/kuma,MenZil/kuma,varunkamra/kuma,darkwing/kuma,darkwing/kuma,jwhitlock/kuma,surajssd/kuma,darkwing/kuma,FrankBian/kuma,groovecoder/kuma,mozilla/kuma,YOTOV-LIMITED/kuma,carnell69/kuma,Elchi3/kuma,scrollback/kuma,nhenezi/kuma,ollie314/kuma,davidyezsetz/kuma,davidyezsetz/kuma,biswajitsahu/kuma,cindyyu/kuma,Elchi3/kuma,hoosteeno/kuma,escattone/kuma,openjck/kuma,mozilla/kuma,SphinxKnight/kuma,openjck/kuma,davidyezsetz/kuma,escattone/kuma,FrankBian/kuma,nhenezi/kuma,RanadeepPolavarapu/kuma,openjck/kuma,utkbansal/kuma,jgmize/kuma,jgmize/kuma,cindyyu/kuma,anaran/kuma,jezdez/kuma,chirilo/kuma,biswajitsahu/kuma,a2sheppy/kuma,carnell69/kuma,biswajitsahu/kuma,a2sheppy/kuma,FrankBian/kuma,robhudson/kuma,ronakkhunt/kuma,davidyezsetz/kuma,ollie314/kuma,varunkamra/kuma,mozilla/kuma,MenZil/kuma,nhenezi/kuma,a2sheppy/kuma,biswajitsahu/kuma,escattone/kuma,whip112/Whip112,whip112/Whip112,RanadeepPolavarapu/kuma,darkwing/kuma,ronakkhunt/kuma,jezdez/kuma,whip112/Whip112,davidyezsetz/kuma,chirilo/kuma,davehunt/kuma,anaran/kuma,utkbansal/kuma,groovecoder/kuma,yfdyh000/kuma,ronakkhunt/kuma,robhudson/kuma,robhudson/kuma,bluemini/kuma,cindyyu/kuma,tximikel/kuma,safwanrahman/kuma,hoosteeno/kuma,anaran/kuma,hoosteeno/kuma,yfdyh000/kuma,groovecoder/kuma,scrollback/kuma,RanadeepPolavarapu/kuma,tximikel/kuma,utkbansal/kuma,Elchi3/kuma,davehunt/kuma,yfdyh000/kuma,anaran/kuma,ollie314/kuma,darkwing/kuma,RanadeepPolavarapu/kuma,ronakkhunt/kuma,jezdez/kuma,surajssd/kuma,ronakkhunt/kuma,ollie314/kuma,utkbansal/kuma,carnell69/kuma,jwhitlock/kuma,surajssd/kuma,jwhitlock/kuma,YOTOV-LIMITED/kuma,hoosteeno/kuma,whip112/Whip112,hoosteeno/kuma,ollie314/kuma,cindyyu/kuma,davehunt/kuma,yfdyh000/kuma,scrollback/kuma,jwhitlock/kuma,varunkamra/kuma,groovecoder/kuma,scrollback/kuma,utkbansal/kuma,SphinxKnight/kuma,yfdyh000/kuma