TIKA-4327: add comment about mchange-commons-java

Author: THausherr

tika-pipes/tika-pipes-integration-tests/src/test/java/org/apache/tika/pipes/core/PipesClientTest.java

@@ -397,6 +397,7 @@ public void testSocketTimeout(@TempDir Path tmp) throws Exception {
             long elapsed = System.currentTimeMillis() - startTime;
 
             // Should timeout due to socket timeout (no heartbeats received within socketTimeoutMs)
+            // fails with FAILED_TO_INITIALIZE when using mchange-commons-java 0.5.0
             assertEquals(PipesResult.RESULT_STATUS.TIMEOUT, pipesResult.status(),
                     "Should timeout when socket times out");