Description of problem:
remove node with app from district, then try to destroy the district, got fail.

Version-Release number of selected component (if applicable):
rhc-broker-0.86.1-1.git.161.f3d1f3a.el6.noarch

How reproducible:
always

Steps to Reproduce:
1.create a district
#rhc-admin-ctl-district -n d1 -c create
2.add a node to the district
#rhc-admin-ctl-district -n d1 -c add-node -i host1
3.create app on the node 
#rhc-create-app -a testapp -t php-5.3
4.remove the node from the district
#rhc-admin-ctl-district -n d1 -c deactivate-node -i host1
#rhc-admin-ctl-district -n d1 -c remove-node -i host1
5.try to destroy the district
#rhc-admin-ctl-district -n d1 -c destroy
  
Actual results:
[root@ip-10-140-2-180 ~]# rhc-admin-ctl-district -n d2 -c destroy
!!!! WARNING !!!! WARNING !!!! WARNING !!!!
You are about to destroy the d2 district.

This is NOT reversible, all remote data for this district will be removed.
Do you want to destroy this district (y/n): y
ERROR OUTPUT:
Couldn't destroy district 'a352059d64d741dc90f7abb2d7aabac5' because it still contains applications and/or nodes



Expected results:
the district should be destroyed successfully

Additional info:
[root@ip-10-140-2-180 ~]# rhc-admin-ctl-district -n d2 


{"max_uid"=>6999,
 "available_uids"=>"<5999 uids hidden>",
 "uuid"=>"a352059d64d741dc90f7abb2d7aabac5",
 "max_capacity"=>6000,
 "server_identities"=>{},
 "name"=>"d2",
 "active_server_identities_size"=>0,
 "creation_time"=>"2012-02-10T00:17:47-05:00",
 "node_profile"=>"std",
 "externally_reserved_uids_size"=>0,
 "available_capacity"=>5999}