Synchronized unversioned and v1 mesos.proto.
Synchronized unversioned and v1 mesos.proto.

Review: https://reviews.apache.org/r/52634/

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