Sleep 6 seconds before unlocking PSTOP

If URsim's time in the container is running a bit slower than the caller's time, we raise an error.

Author: urfeex

tests/test_ur_driver.cpp

@@ -268,7 +268,7 @@ TEST_F(UrDriverTest, read_error_code)
   ASSERT_EQ(error_codes.at(0).message_argument, 0);
 
   // Wait for after PSTOP before clearing it
-  std::this_thread::sleep_for(std::chrono::seconds(5));
+  std::this_thread::sleep_for(std::chrono::seconds(6));
 
   EXPECT_TRUE(g_dashboard_client->commandCloseSafetyPopup());
   EXPECT_TRUE(g_dashboard_client->commandUnlockProtectiveStop());