Fixed an inconsistency in argument ordering.
Fixed an inconsistency in argument ordering.

In the master's validation of offers, the functions take offer IDs
first, followed by the master pointer. This fixes an inconsistent
function.

Review: https://reviews.apache.org/r/54649/

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