JOHNZON-422 MapperConverterExceptionsTest fails on Windodws due to wrong line break

Author: struberg

johnzon-jsonb/src/test/java/org/apache/johnzon/jsonb/ExceptionAsserts.java

@@ -62,7 +62,7 @@ public ExceptionAsserts assertCauseChain(final Throwable expected) {
     }
 
     public ExceptionAsserts assertMessage(final String expected) {
-        assertEquals(expected, throwable.getMessage());
+        assertEquals(expected.replace("\r\n", "\n"), throwable.getMessage().replace("\r\n", "\n"));
         return this;
     }