Some CMakeLists.txt cleanup.
Some CMakeLists.txt cleanup.

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