fix wait-for with keep-alive (fix #1150)
fix wait-for with keep-alive (fix #1150)

galenyuan/vue,Jonavin/vue,Jonavin/vue,jwdeitch/vue,Iamlars/vue,AtChina/vue,beni55/vue,shupan123/vue-fixed-type,jRoadie/vue,squallyan/vue,diermengdierme/vue,zOxta/vue,jhaesus/vue,seedalpha/vue,Endika/vue,gold3bear/vue,wangjun/vue,AtChina/vue,th0r/vue,zOxta/vue,lovewitty/vue,Suixinlei/vue,Zeratul5/vue,JsAaron/vue,lazarofl/vue,yuche/vue,PUSEN/vue,meleslilijing/vue,fergaldoyle/vue,seedalpha/vue,WQuanfeng/vue,shupan123/vue-fixed-type,th0r/vue,prosenjit-itobuz/vue,diermengdierme/vue,fergaldoyle/vue,noyobo/vue,galenyuan/vue,fergaldoyle/vue,karevn/vue,cgvarela/vue,GloriaCHL/vue,karevn/vue,yuByte/vue,WQuanfeng/vue,JsAaron/vue,ke-pan/vue,macroxing/vue,lepture/vue,15521316173/vue,cuhuak/vue,jRoadie/vue,zsh2938/vue,prosenjit-itobuz/vue,zsh2938/vue,noyobo/vue,diermengdierme/vue,endaaman/vue,squallyan/vue,meleslilijing/vue,GloriaCHL/vue,Alen-gao/vue,gxr1020/vue,lazarofl/vue,macroxing/vue,bsn069/vue,Suixinlei/vue,15521316173/vue,lishengzxc/vue,gxr1020/vue,ke-pan/vue,Zeratul5/vue,lepture/vue,longjl/vue,Iamlars/vue,cuhuak/vue,karevn/vue,endaaman/vue,yuche/vue,longjl/vue,Endika/vue,wangjun/vue,bsn069/vue,lovewitty/vue,PUSEN/vue,shupan123/vue-fixed-type,VimVincent/vue,seedalpha/vue,Endika/vue,gold3bear/vue,Alen-gao/vue,yuByte/vue,galenyuan/vue,jhaesus/vue,beni55/vue,jwdeitch/vue,cgvarela/vue,VimVincent/vue,lishengzxc/vue,lepture/vue,th0r/vue