refactor the set_env command test.
refactor the set_env command test.

simonleung8/cli,mcowger/cli,carnell69/cli,SrinivasChilveri/cli,kavoj/cli,carnell69/cli,saurabhguptasg/cli,saurabhguptasg/cli,HuaweiTech/cli,ReachingOut/cli,rastasheep/trash-can,fujitsu-cf/cli,xingzhou/cli,mcowger/cli,mcowger/cli,xingzhou/cli,nttlabs/cli,markstgodard/cli,TomG713/cli,AmitRoushan/cli,saravana76/cli,hyenaspots/cli,Zouuup/cli,Zouuup/cli,simonleung8/cli,HuaweiTech/cli,hyenaspots/cli,ofer43211/cli,mcintyred/cli,SrinivasChilveri/cli,zhang-hua/cli,nttlabs/cli,evanfarrar/cli,carnell69/cli,rastasheep/trash-can,EngineerBetter/cli,srikanth88infy/cli,saurabhguptasg/cli,SrinivasChilveri/cli,simonleung8/cli,mcowger/cli,markstgodard/cli,cgvarela/cli,TomG713/cli,evanfarrar/cli,hyenaspots/cli,ReachingOut/cli,diatmpravin/cli,18F/cli,zhang-hua/cli,TomG713/cli,18F/cli,srikanth88infy/cli,AmitRoushan/cli,nttlabs/cli,rastasheep/trash-can,cf-routing/cli,SrinivasChilveri/cli,AmitRoushan/cli,pishro-cc/cli,zhang-hua/cli,diatmpravin/cli,kavoj/cli,diatmpravin/cli,mcintyred/cli,mcintyred/cli,cf-routing/cli,HuaweiTech/cli,srikanth88infy/cli,evanfarrar/cli,srikanth88infy/cli,zhang-hua/cli,saravana76/cli,TomG713/cli,kavoj/cli,evanfarrar/cli,ofer43211/cli,pishro-cc/cli,HuaweiTech/cli,saurabhguptasg/cli,rastasheep/trash-can,markstgodard/cli,saravana76/cli,fujitsu-cf/cli,fujitsu-cf/cli,nttlabs/cli,18F/cli,cf-routing/cli,saravana76/cli,cgvarela/cli,kavoj/cli,pishro-cc/cli,diatmpravin/cli,cgvarela/cli,xingzhou/cli,18F/cli,carnell69/cli,ofer43211/cli,AmitRoushan/cli,mcintyred/cli,EngineerBetter/cli,ofer43211/cli,ReachingOut/cli,EngineerBetter/cli,pishro-cc/cli,xingzhou/cli,cgvarela/cli,Zouuup/cli,EngineerBetter/cli,Zouuup/cli,markstgodard/cli,hyenaspots/cli,ReachingOut/cli,cf-routing/cli