avoid flaky test that subscriber might not receive the message (#810)

increase publish times as the publisher and subscriber are not using reliable QoS settings

Signed-off-by: Chen Lihui <[email protected]>

Author: Chen Lihui

ros2topic/test/test_echo_pub.py

@@ -233,7 +233,7 @@ def test_pub_maxwait_malformed_arguments(self, launch_service, proc_info, proc_o
     def test_pub_maxwait_yields(self, launch_service, proc_info, proc_output):
         topic = '/clitest/topic/pub/max_wait_timeout'
         command_action = ExecuteProcess(
-            cmd=(['ros2', 'topic', 'pub', '-t', '1', '--max-wait-time-secs', '20', topic,
+            cmd=(['ros2', 'topic', 'pub', '-t', '10', '--max-wait-time-secs', '20', topic,
                   'std_msgs/String', 'data: hello']),
             additional_env={
                 'PYTHONUNBUFFERED': '1'