Added test cases for PARTITION_AWARE behavior.
Added test cases for PARTITION_AWARE behavior.

Review: https://reviews.apache.org/r/50706/

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