Description of problem:
It's failed to detect the subaccount which has applications with its 'updated_at' field in mongodb also is one week ago by rhc-admin-delete-subaccounts.

Version-Release number of selected component (if applicable):
devenv_4067

How reproducible:
always

Steps to Reproduce:
1. Add capacity to your rhlogin
oo-admin-ctl-user -l $user --allowsubaccount true --inheritgearsize true --addgearsize c9

2. Create a subaccount
curl -k -X POST -H 'Accept: application/xml' -H 'X-Impersonate-User: $subaccount' -d id=$subdomain --user $user:$password https://ec2-50-17-83-185.compute-1.amazonaws.com/broker/rest/domains

3. Create an application as subaccount
curl -k -X POST -H 'Accept: application/xml' -H 'X-Impersonate-User: $subaccount' -d name=c1 -d cartridge=php-5.3 -d gear_profile=c9 --user $user:$password https://ec2-50-17-83-185.compute-1.amazonaws.com/broker/rest/domains/$subdomain/applications

4. Update the value of 'updated_at' of the subaccount to a week ago in mongo
# mongo openshift_broker_dev
> db.cloud_users.update({"login":"$subaccount"},{$set:{"updated_at":"$time"}})
for example:
db.cloud_users.update({"login":"c9sub"},{$set:{"updated_at":ISODate("2013-06-01T02:46:45.185Z")}})

5. On broker, run oo-admin-delete-subaccounts
rhc-admin-delete-subaccounts -l $user  -v

Actual results:
Summary of one week old subaccounts for user 'chunchen':
	Total       : 0
	Deleted     : 0
	Failed      : 0
	Unprocessed : 0

SUCCESS

Expected results:
Should detect the subaccount even if it has applications by rhc-admin-delete-subaccounts

Additional info: