Speed up MasterMaintenanceTest.InverseOffers.
Speed up MasterMaintenanceTest.InverseOffers.

Review: https://reviews.apache.org/r/43519/

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