[pitivi] tests: Let rendering take the time it requires

[Alexandru Băluț <alexbalut src gnome org>]

commit 1625bbf56805c704fdfd1e0cc42c9b09f0d71f95
Author: Thibault Saunier <tsaunier igalia com>
Date:   Mon May 20 10:30:24 2019 -0400

    tests: Let rendering take the time it requires
    
    And let the test launcher timeout if it should

 tests/test_render.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/tests/test_render.py b/tests/test_render.py
index 1c83ec08..f7c9de70 100644
--- a/tests/test_render.py
+++ b/tests/test_render.py
@@ -290,7 +290,7 @@ class TestRender(BaseTestMediaLibrary):
                         dialog._renderButtonClickedCb(None)
 
             message = dialog._pipeline.get_bus().timed_pop_filtered(
-                10 * Gst.SECOND,
+                Gst.CLOCK_TIME_NONE,
                 Gst.MessageType.EOS | Gst.MessageType.ERROR)
             self.assertIsNotNone(message)
             Gst.debug_bin_to_dot_file_with_ts(