Use containsubstrings matcher in ui_test
Use containsubstrings matcher in ui_test

This string should be colorized. It appears flakey, but it seems like
this test should never pass.

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