Description of problem:
When listing an application, old applications that were created before gear profiles existed, gets reported with a "gear_profile": null.

Chat with dmcphers on the 14th of September 2012:
<snip>
(05:00:24 PM) dmcphers: adietish: is that an older app?
(05:00:42 PM) dmcphers: yeah I see it is
(05:01:05 PM) dmcphers: it was before we had gear size
(05:01:30 PM) dmcphers: can open a bug
</snip>

Version-Release number of selected component (if applicable):
1.0

How reproducible:
1. ASSERT: make sure you have an application, that was created before gear profiles were introduced.
2. EXEC: list this application:
curl -k -H "Accept: application/json" --user "<USER>:<PASS>" https://openshift.redhat.com/broker/rest/domains/<DOMAINNAME>/applications/<APPLICATIONNAME>

Result:
{
    "data": {
        "aliases": [], 
        "app_url": "http://dfdf-man.rhcloud.com/", 
        "creation_time": "2012-01-26T13:07:43-05:00", 
        "domain_id": "man", 
        "embedded": {
            "mysql-5.1": {
                "info": "Connection URL: mysql://127.3.163.129:3306/\n"
            }, 
            "phpmyadmin-3.4": {
                "info": "URL: https://dfdf-man.rhcloud.com/phpmyadmin/\n"
            }
        }, 
        "framework": "jbossas-7", 
        "gear_count": 1, 
        "gear_profile": null, 

Expected results:
The broker should report the default gear this application is running on, not null. The openshift-java-client could assume a default gear here, but this is IHMO backend logic that should not pulled into the client. The broker should report what's the default gear it is running on.