allow load balancing mode to be set via env var
allow load balancing mode to be set via env var

mikejihbe/marathon,ayouwei/marathon,pugna0/marathon,titosand/marathon,Yhgenomics/marathon,HardikDR/marathon,Caerostris/marathon,guenter/marathon,manojlds/marathon,meln1k/marathon,manojlds/marathon,ss75710541/marathon,Caerostris/marathon,EasonYi/marathon,janisz/marathon,gsantovena/marathon,murat-lacework/marathon,timcharper/marathon,pgkelley4/marathon,cherrydocker/marathon-1,gsantovena/marathon,yp-engineering/marathon,Yhgenomics/marathon,meln1k/marathon,Caerostris/marathon,bsideup/marathon,murat-lacework/marathon,sepiroth887/marathon,matsluni/marathon,ramitsurana/marathon,lelezi/marathon,Kosta-Github/marathon,titosand/marathon,pugna0/marathon,ramitsurana/marathon,rtward/marathon,IanSaunders/marathon,MrMarvin/marathon,matsluni/marathon,meln1k/marathon,mesosphere/marathon,cgvarela/marathon,rtward/marathon,natemurthy/marathon,sepiroth887/marathon,cherrydocker/marathon-1,meln1k/marathon,mesosphere/marathon,SivagnanamCiena/marathon,rtward/marathon,ss75710541/marathon,Caerostris/marathon,ss75710541/marathon,okuryu/marathon,SivagnanamCiena/marathon,HardikDR/marathon,mesosphere/marathon,EasonYi/marathon,timcharper/marathon,MrMarvin/marathon,vivekjuneja/marathon,lelezi/marathon,bsideup/marathon,HardikDR/marathon,gsantovena/marathon,okuryu/marathon,guenter/marathon,mikejihbe/marathon,matsluni/marathon,Yhgenomics/marathon,ramitsurana/marathon,janisz/marathon,MrMarvin/marathon,guenter/marathon,guenter/marathon,janisz/marathon,bsideup/marathon,lelezi/marathon,cherrydocker/marathon-1,ayouwei/marathon,murat-lacework/marathon,natemurthy/marathon,ayouwei/marathon,sledigabel/marathon,janisz/marathon,timcharper/marathon,yp-engineering/marathon,manojlds/marathon,vivekjuneja/marathon,sledigabel/marathon,okuryu/marathon,hangyan/marathon,gsantovena/marathon,guenter/marathon,Kosta-Github/marathon,meln1k/marathon,gsantovena/marathon,cgvarela/marathon,mesosphere/marathon,janisz/marathon,IanSaunders/marathon,hangyan/marathon,vivekjuneja/marathon,mesosphere/marathon,SivagnanamCiena/marathon,cgvarela/marathon,pgkelley4/marathon,natemurthy/marathon,mikejihbe/marathon,Caerostris/marathon,IanSaunders/marathon,EasonYi/marathon,hangyan/marathon,sledigabel/marathon,sepiroth887/marathon,pugna0/marathon