Fix integration test env config filename

Signed-off-by: Hunor Csomortáni <csomh@redhat.com>

tests/integration/conftest.py

@@ -12,7 +12,7 @@
 def test_env():
     """Test environment configuration.
     """
-    with open('test.env') as f:
+    with open('test.env.yaml') as f:
         env = yaml.safe_load(f)
     return env