Fixed style problem in TODO.
Fixed style problem in TODO.

Fixes commit 920930f which introduced a TODO comment which breaks the style
checker.

Review: https://reviews.apache.org/r/36202

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