Generating two subtitle tracks per job in the generation test

test.py

@@ -469,7 +469,7 @@ class PipelineTest(DaemonTest):
 
     #@unittest.skip("This test is very slow")
     def test_generating_subs(self):
-        tracknames = ['Generated_1']
+        tracknames = ['Generated_1', 'Generated_2']
         job_id_spec_map = {}
         for i in range(3):
             jobspec = self.init_job(source_count=1, poster_count=1)