Properly set database connection string in cloud.gov

app/cloudfoundry_config.py

@@ -14,6 +14,10 @@ class CloudfoundryConfig:
             'region': ''
         }
 
+    @property
+    def database_url(self):
+        return os.environ.get('DATABASE_URL', '').replace('postgres://', 'postgresql://')
+
     @property
     def redis_url(self):
         try: