Clarified a comment.
Clarified a comment.

Review: https://reviews.apache.org/r/52720/

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