Fixed the test helper dependency in CMake.
Fixed the test helper dependency in CMake.

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