fix(tests): Fix race in tests

The start time can be equal to the current time if your computer is just
fast enough.

Co-Authored-By: Torsten Will <[email protected]>

src/test/java/com/sipgate/li/lib/x1/server/X1HttpServerHandlerTest.java

@@ -412,6 +412,6 @@ private static void assertCommonFields(
     assertThat(responseMessage.getVersion()).isEqualTo(VERSION);
 
     final var timeinMillis = responseMessage.getMessageTimestamp().toGregorianCalendar().getTimeInMillis();
-    assertThat(timeinMillis).isGreaterThan(startTimeInMillis);
+    assertThat(timeinMillis).isGreaterThanOrEqualTo(startTimeInMillis);
   }
 }