Updated sorter benchmark to time unallocation and agent removal.
Updated sorter benchmark to time unallocation and agent removal.

This patch is adding cleanup to the sorter:

1) Added time elapse for unallocated all resources for all clients.
2) Added time elapse for removing all agents.
3) Added time elapse for removing all clients.

Review: https://reviews.apache.org/r/50877/

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