Proxy the job owner from google to CUPS

Google gives us a ownerId and if we set job-originating-user-name CUPS
will display the user's email address as the other in the print queue.

cloudprint/cloudprint.py

@@ -409,6 +409,7 @@ def process_job(cups_connection, cpp, printer, job):
             del options['request']
 
         options = dict((str(k), str(v)) for k, v in list(options.items()))
+        options['job-originating-user-name'] = job['ownerId']
 
         # Cap the title length to 255, or cups will complain about invalid
         # job-name

test/test_process_jobs.py

@@ -20,6 +20,7 @@ def test_print(requests, cups, cpp, xmpp_conn):
         'ticketUrl': 'http://ticket',
         'title': '*' * 300,
         'id': 'job_1',
+        'ownerId': 'owner@example.com'
     }]
 
     xmpp_conn.is_connected.return_value = True
@@ -43,6 +44,7 @@ def test_print(requests, cups, cpp, xmpp_conn):
         {
             'a': '1',
             'b': '2',
+            'job-originating-user-name': 'owner@example.com',
         },
     )
     cpp.finish_job.assert_called_with('job_1')
@@ -59,6 +61,7 @@ def test_retry(requests, cups, cpp, xmpp_conn):
         'ticketUrl': 'http://ticket',
         'title': '*' * 300,
         'id': 'job_1',
+        'ownerId': 'owner@example.com'
     }]
 
     requests.get(url='http://print_job.pdf', status_code=500)
@@ -77,6 +80,7 @@ def test_failed(requests, cups, cpp, xmpp_conn):
         'ticketUrl': 'http://ticket',
         'title': '*' * 300,
         'id': 'job_1',
+        'ownerId': 'owner@example.com'
     }]
 
     requests.get(url='http://print_job.pdf', status_code=500)