Doxygen styleguide revisions.
Doxygen styleguide revisions.

See conversation at https://reviews.apache.org/r/36193.

Review: https://reviews.apache.org/r/36218

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