Fixed the build error in routing tests.
Fixed the build error in routing tests.

Review: https://reviews.apache.org/r/24902

zmalik/mesos,zmalik/mesos,yuquanshan/customizedMesos,verizonlabs/mesos,asamerh4/mesos,Gilbert88/mesos,jpeach/mesos,verizonlabs/mesos,craimbert/mesos,neilconway/mesos,Aman-Jain-14/customizedMesos,Aman-Jain-14/customizedMesos,asamerh4/mesos,neilconway/mesos,reneploetz/mesos,jpeach/mesos,kaysoky/mesos,asamerh4/mesos,Gilbert88/mesos,gsantovena/mesos,jpeach/mesos,andschwa/mesos,dforsyth/mesos,andschwa/mesos,andschwa/mesos,Gilbert88/mesos,zmalik/mesos,Gilbert88/mesos,jpeach/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,abudnik/mesos,asamerh4/mesos,Aman-Jain-14/customizedMesos,craimbert/mesos,andschwa/mesos,yuquanshan/customizedMesos,craimbert/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,chhsia0/mesos,jpeach/mesos,chhsia0/mesos,verizonlabs/mesos,yuquanshan/customizedMesos,zmalik/mesos,dforsyth/mesos,dforsyth/mesos,verizonlabs/mesos,kaysoky/mesos,kaysoky/mesos,yuquanshan/customizedMesos,craimbert/mesos,craimbert/mesos,kaysoky/mesos,yuquanshan/customizedMesos,reneploetz/mesos,abudnik/mesos,Gilbert88/mesos,reneploetz/mesos,dforsyth/mesos,neilconway/mesos,gsantovena/mesos,jpeach/mesos,reneploetz/mesos,abudnik/mesos,chhsia0/mesos,zmalik/mesos,Aman-Jain-14/customizedMesos,reneploetz/mesos,gsantovena/mesos,Aman-Jain-14/customizedMesos,gsantovena/mesos,verizonlabs/mesos,yuquanshan/customizedMesos,craimbert/mesos,verizonlabs/mesos,neilconway/mesos,chhsia0/mesos,andschwa/mesos,reneploetz/mesos,asamerh4/mesos,kaysoky/mesos,chhsia0/mesos,neilconway/mesos,neilconway/mesos,abudnik/mesos,andschwa/mesos,asamerh4/mesos,dforsyth/mesos,craimbert/mesos,abudnik/mesos,neilconway/mesos,jpeach/mesos,yuquanshan/customizedMesos,asamerh4/mesos,Gilbert88/mesos,andschwa/mesos,kaysoky/mesos,abudnik/mesos,verizonlabs/mesos,zmalik/mesos,kaysoky/mesos,dforsyth/mesos,abudnik/mesos,Gilbert88/mesos,chhsia0/mesos,gsantovena/mesos,reneploetz/mesos,gsantovena/mesos,chhsia0/mesos,dforsyth/mesos