Ensure LANG is set when running tests on Unix
Ensure LANG is set when running tests on Unix

Various tests depend on CurrentCulture, and when run in the service in CI, LANG is defaulting to empty which then causes the locale to default to "POSIX", which causes problems for some of the expectations in various tests.  This ensures that LANG is set.

pallavit/corefx,manu-silicon/corefx,YoupHulsebos/corefx,richlander/corefx,jcme/corefx,kkurni/corefx,krytarowski/corefx,rjxby/corefx,mokchhya/corefx,yizhang82/corefx,jhendrixMSFT/corefx,khdang/corefx,dhoehna/corefx,krk/corefx,khdang/corefx,twsouthwick/corefx,tijoytom/corefx,weltkante/corefx,nchikanov/corefx,benpye/corefx,JosephTremoulet/corefx,DnlHarvey/corefx,ellismg/corefx,nchikanov/corefx,shmao/corefx,dhoehna/corefx,manu-silicon/corefx,twsouthwick/corefx,yizhang82/corefx,krytarowski/corefx,tstringer/corefx,jcme/corefx,weltkante/corefx,stephenmichaelf/corefx,ptoonen/corefx,krk/corefx,Petermarcu/corefx,BrennanConroy/corefx,marksmeltzer/corefx,dhoehna/corefx,richlander/corefx,rjxby/corefx,shmao/corefx,dhoehna/corefx,YoupHulsebos/corefx,lggomez/corefx,billwert/corefx,iamjasonp/corefx,YoupHulsebos/corefx,rubo/corefx,alexperovich/corefx,zhenlan/corefx,Priya91/corefx-1,stone-li/corefx,dhoehna/corefx,wtgodbe/corefx,alexperovich/corefx,mazong1123/corefx,jcme/corefx,marksmeltzer/corefx,parjong/corefx,rjxby/corefx,rjxby/corefx,nbarbettini/corefx,pallavit/corefx,tijoytom/corefx,Priya91/corefx-1,alexperovich/corefx,JosephTremoulet/corefx,Ermiar/corefx,cartermp/corefx,iamjasonp/corefx,fgreinacher/corefx,Ermiar/corefx,the-dwyer/corefx,parjong/corefx,alphonsekurian/corefx,ViktorHofer/corefx,ellismg/corefx,adamralph/corefx,mokchhya/corefx,nchikanov/corefx,gkhanna79/corefx,JosephTremoulet/corefx,MaggieTsang/corefx,parjong/corefx,alphonsekurian/corefx,kkurni/corefx,zhenlan/corefx,Chrisboh/corefx,shimingsg/corefx,jcme/corefx,benpye/corefx,kkurni/corefx,iamjasonp/corefx,dotnet-bot/corefx,cydhaselton/corefx,axelheer/corefx,rjxby/corefx,cydhaselton/corefx,ravimeda/corefx,benjamin-bader/corefx,billwert/corefx,cydhaselton/corefx,weltkante/corefx,DnlHarvey/corefx,zhenlan/corefx,JosephTremoulet/corefx,jlin177/corefx,krytarowski/corefx,alphonsekurian/corefx,nbarbettini/corefx,shmao/corefx,elijah6/corefx,axelheer/corefx,manu-silicon/corefx,benpye/corefx,twsouthwick/corefx,billwert/corefx,khdang/corefx,jhendrixMSFT/corefx,parjong/corefx,the-dwyer/corefx,DnlHarvey/corefx,lggomez/corefx,jlin177/corefx,dhoehna/corefx,krytarowski/corefx,manu-silicon/corefx,mazong1123/corefx,SGuyGe/corefx,jlin177/corefx,manu-silicon/corefx,parjong/corefx,jhendrixMSFT/corefx,rahku/corefx,parjong/corefx,mokchhya/corefx,YoupHulsebos/corefx,elijah6/corefx,ptoonen/corefx,axelheer/corefx,ViktorHofer/corefx,tijoytom/corefx,nchikanov/corefx,alphonsekurian/corefx,benjamin-bader/corefx,elijah6/corefx,benpye/corefx,krytarowski/corefx,tijoytom/corefx,DnlHarvey/corefx,Jiayili1/corefx,nbarbettini/corefx,benpye/corefx,rubo/corefx,mokchhya/corefx,benjamin-bader/corefx,axelheer/corefx,yizhang82/corefx,kkurni/corefx,dotnet-bot/corefx,jlin177/corefx,iamjasonp/corefx,stephenmichaelf/corefx,MaggieTsang/corefx,weltkante/corefx,seanshpark/corefx,rubo/corefx,gkhanna79/corefx,ravimeda/corefx,iamjasonp/corefx,zhenlan/corefx,mmitche/corefx,zhenlan/corefx,stone-li/corefx,shimingsg/corefx,mokchhya/corefx,BrennanConroy/corefx,shmao/corefx,stephenmichaelf/corefx,axelheer/corefx,seanshpark/corefx,stone-li/corefx,Jiayili1/corefx,marksmeltzer/corefx,stephenmichaelf/corefx,richlander/corefx,dhoehna/corefx,SGuyGe/corefx,MaggieTsang/corefx,yizhang82/corefx,DnlHarvey/corefx,nchikanov/corefx,stephenmichaelf/corefx,Priya91/corefx-1,elijah6/corefx,krytarowski/corefx,rubo/corefx,YoupHulsebos/corefx,shahid-pk/corefx,lggomez/corefx,ptoonen/corefx,ViktorHofer/corefx,the-dwyer/corefx,DnlHarvey/corefx,benjamin-bader/corefx,mokchhya/corefx,ViktorHofer/corefx,ericstj/corefx,mazong1123/corefx,ellismg/corefx,rahku/corefx,shimingsg/corefx,alphonsekurian/corefx,Petermarcu/corefx,gkhanna79/corefx,krytarowski/corefx,krk/corefx,alexperovich/corefx,JosephTremoulet/corefx,nchikanov/corefx,wtgodbe/corefx,Jiayili1/corefx,jhendrixMSFT/corefx,shahid-pk/corefx,Petermarcu/corefx,shmao/corefx,wtgodbe/corefx,rahku/corefx,tijoytom/corefx,BrennanConroy/corefx,ravimeda/corefx,pallavit/corefx,Priya91/corefx-1,twsouthwick/corefx,jlin177/corefx,nchikanov/corefx,JosephTremoulet/corefx,mmitche/corefx,lggomez/corefx,dsplaisted/corefx,shahid-pk/corefx,Jiayili1/corefx,MaggieTsang/corefx,rahku/corefx,mazong1123/corefx,fgreinacher/corefx,dsplaisted/corefx,tstringer/corefx,adamralph/corefx,fgreinacher/corefx,stone-li/corefx,the-dwyer/corefx,MaggieTsang/corefx,nbarbettini/corefx,weltkante/corefx,iamjasonp/corefx,shmao/corefx,ptoonen/corefx,DnlHarvey/corefx,shmao/corefx,marksmeltzer/corefx,Petermarcu/corefx,Ermiar/corefx,ericstj/corefx,alexperovich/corefx,cartermp/corefx,gkhanna79/corefx,mazong1123/corefx,Ermiar/corefx,alphonsekurian/corefx,mmitche/corefx,rubo/corefx,weltkante/corefx,jhendrixMSFT/corefx,stephenmichaelf/corefx,khdang/corefx,adamralph/corefx,cartermp/corefx,wtgodbe/corefx,jcme/corefx,tstringer/corefx,weltkante/corefx,richlander/corefx,shimingsg/corefx,JosephTremoulet/corefx,richlander/corefx,parjong/corefx,cydhaselton/corefx,mazong1123/corefx,mmitche/corefx,elijah6/corefx,gkhanna79/corefx,mazong1123/corefx,billwert/corefx,seanshpark/corefx,lggomez/corefx,cydhaselton/corefx,Chrisboh/corefx,ViktorHofer/corefx,YoupHulsebos/corefx,Chrisboh/corefx,lggomez/corefx,shahid-pk/corefx,MaggieTsang/corefx,SGuyGe/corefx,seanshpark/corefx,pallavit/corefx,manu-silicon/corefx,dotnet-bot/corefx,stone-li/corefx,jlin177/corefx,shimingsg/corefx,tijoytom/corefx,alexperovich/corefx,lggomez/corefx,wtgodbe/corefx,mmitche/corefx,marksmeltzer/corefx,gkhanna79/corefx,billwert/corefx,yizhang82/corefx,tstringer/corefx,ravimeda/corefx,ericstj/corefx,marksmeltzer/corefx,Petermarcu/corefx,kkurni/corefx,Jiayili1/corefx,SGuyGe/corefx,yizhang82/corefx,ptoonen/corefx,tstringer/corefx,rjxby/corefx,krk/corefx,nbarbettini/corefx,ptoonen/corefx,the-dwyer/corefx,tstringer/corefx,the-dwyer/corefx,elijah6/corefx,ericstj/corefx,billwert/corefx,krk/corefx,kkurni/corefx,rahku/corefx,tijoytom/corefx,ViktorHofer/corefx,shimingsg/corefx,jlin177/corefx,Jiayili1/corefx,Ermiar/corefx,mmitche/corefx,ravimeda/corefx,Ermiar/corefx,ravimeda/corefx,nbarbettini/corefx,ericstj/corefx,SGuyGe/corefx,billwert/corefx,benpye/corefx,elijah6/corefx,dotnet-bot/corefx,rjxby/corefx,cydhaselton/corefx,stone-li/corefx,Petermarcu/corefx,shahid-pk/corefx,fgreinacher/corefx,Petermarcu/corefx,richlander/corefx,Chrisboh/corefx,Ermiar/corefx,marksmeltzer/corefx,ericstj/corefx,benjamin-bader/corefx,seanshpark/corefx,jhendrixMSFT/corefx,mmitche/corefx,manu-silicon/corefx,stephenmichaelf/corefx,Chrisboh/corefx,shimingsg/corefx,pallavit/corefx,ericstj/corefx,Priya91/corefx-1,SGuyGe/corefx,richlander/corefx,YoupHulsebos/corefx,rahku/corefx,gkhanna79/corefx,zhenlan/corefx,khdang/corefx,jcme/corefx,ellismg/corefx,jhendrixMSFT/corefx,ViktorHofer/corefx,cartermp/corefx,stone-li/corefx,ptoonen/corefx,cydhaselton/corefx,Priya91/corefx-1,pallavit/corefx,twsouthwick/corefx,benjamin-bader/corefx,shahid-pk/corefx,seanshpark/corefx,nbarbettini/corefx,yizhang82/corefx,alexperovich/corefx,Jiayili1/corefx,axelheer/corefx,Chrisboh/corefx,alphonsekurian/corefx,cartermp/corefx,krk/corefx,cartermp/corefx,khdang/corefx,dotnet-bot/corefx,ellismg/corefx,iamjasonp/corefx,dotnet-bot/corefx,dotnet-bot/corefx,zhenlan/corefx,twsouthwick/corefx,wtgodbe/corefx,the-dwyer/corefx,ellismg/corefx,ravimeda/corefx,rahku/corefx,wtgodbe/corefx,twsouthwick/corefx,dsplaisted/corefx,krk/corefx,seanshpark/corefx,MaggieTsang/corefx