Fix typo in DockerInfo protobuf comment
Fix typo in DockerInfo protobuf comment

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