Replace allow_failure with nowait option and add randomness to locking
Replace allow_failure with nowait option and add randomness to locking

mitsuhiko/sentry,boneyao/sentry,JamesMura/sentry,alexm92/sentry,ifduyue/sentry,songyi199111/sentry,argonemyth/sentry,beni55/sentry,fuziontech/sentry,BuildingLink/sentry,kevinlondon/sentry,looker/sentry,beni55/sentry,JackDanger/sentry,SilentCircle/sentry,JackDanger/sentry,hongliang5623/sentry,BayanGroup/sentry,kevinlondon/sentry,JTCunning/sentry,felixbuenemann/sentry,jokey2k/sentry,fotinakis/sentry,rdio/sentry,beeftornado/sentry,beeftornado/sentry,imankulov/sentry,gencer/sentry,jokey2k/sentry,BuildingLink/sentry,camilonova/sentry,llonchj/sentry,looker/sentry,1tush/sentry,imankulov/sentry,pauloschilling/sentry,kevinastone/sentry,llonchj/sentry,pauloschilling/sentry,ewdurbin/sentry,NickPresta/sentry,kevinastone/sentry,Natim/sentry,SilentCircle/sentry,beni55/sentry,mvaled/sentry,mvaled/sentry,vperron/sentry,boneyao/sentry,jean/sentry,JamesMura/sentry,camilonova/sentry,ewdurbin/sentry,looker/sentry,ngonzalvez/sentry,BuildingLink/sentry,wong2/sentry,JamesMura/sentry,wujuguang/sentry,JackDanger/sentry,mvaled/sentry,ifduyue/sentry,BayanGroup/sentry,kevinastone/sentry,jean/sentry,Natim/sentry,SilentCircle/sentry,hongliang5623/sentry,zenefits/sentry,zenefits/sentry,mitsuhiko/sentry,ifduyue/sentry,felixbuenemann/sentry,nicholasserra/sentry,gencer/sentry,JamesMura/sentry,looker/sentry,JamesMura/sentry,ifduyue/sentry,wujuguang/sentry,gg7/sentry,1tush/sentry,daevaorn/sentry,zenefits/sentry,jean/sentry,NickPresta/sentry,NickPresta/sentry,Natim/sentry,zenefits/sentry,korealerts1/sentry,BuildingLink/sentry,ngonzalvez/sentry,alexm92/sentry,jean/sentry,JTCunning/sentry,gg7/sentry,fotinakis/sentry,wujuguang/sentry,daevaorn/sentry,jean/sentry,llonchj/sentry,korealerts1/sentry,argonemyth/sentry,felixbuenemann/sentry,mvaled/sentry,ewdurbin/sentry,SilentCircle/sentry,gg7/sentry,TedaLIEz/sentry,drcapulet/sentry,wong2/sentry,BuildingLink/sentry,fuziontech/sentry,wong2/sentry,beeftornado/sentry,nicholasserra/sentry,songyi199111/sentry,vperron/sentry,kevinlondon/sentry,imankulov/sentry,vperron/sentry,hongliang5623/sentry,ngonzalvez/sentry,drcapulet/sentry,Kryz/sentry,TedaLIEz/sentry,fuziontech/sentry,drcapulet/sentry,mvaled/sentry,camilonova/sentry,gencer/sentry,alexm92/sentry,Kryz/sentry,boneyao/sentry,Kryz/sentry,argonemyth/sentry,rdio/sentry,ifduyue/sentry,BayanGroup/sentry,gencer/sentry,pauloschilling/sentry,daevaorn/sentry,songyi199111/sentry,zenefits/sentry,rdio/sentry,JTCunning/sentry,looker/sentry,nicholasserra/sentry,daevaorn/sentry,1tush/sentry,korealerts1/sentry,NickPresta/sentry,rdio/sentry,mvaled/sentry,fotinakis/sentry,gencer/sentry,TedaLIEz/sentry,jokey2k/sentry,fotinakis/sentry