Fixed a regression in the balloon framework test.
Fixed a regression in the balloon framework test.

This test broke with the introduction of `Resource.allocation_info`
for MULTI_ROLE framework support. Since the balloon framework uses
the `Resources` library (which is now updated to observe the
allocation info), the test needs to be made aware of the
distinction between allocated and unallocated resources.

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