Additional debug logging after CI test failure

Log the full trace before clearing it so the logs have the full picture
of what was received.

test/org/apache/coyote/http2/TestRfc9218.java

@@ -43,13 +43,19 @@ public void testPriority() throws Exception {
             readSimpleGetResponse();
         }
 
+        String trace = output.getTrace();
+        System.out.println(trace);
+        output.clearTrace();
+
         // At this point the connection window should be 1k
 
         // Process a request on stream 17. This should consume the connection window.
         sendSimpleGetRequest(17);
         // 17-headers, 17-1k-body
         parser.readFrame();
         parser.readFrame();
+        trace = output.getTrace();
+        System.out.println(trace);
         output.clearTrace();
 
         // Send additional requests. Connection window is empty so only headers will be returned.
@@ -59,6 +65,8 @@ public void testPriority() throws Exception {
         // 19-headers, 21-headers
         parser.readFrame();
         parser.readFrame();
+        trace = output.getTrace();
+        System.out.println(trace);
         output.clearTrace();
 
         // At this point 17, 19 and 21 are all blocked because the connection window is zero.
@@ -102,7 +110,7 @@ public void testPriority() throws Exception {
         parser.readFrame();
         parser.readFrame();
 
-        String trace = output.getTrace();
+        trace = output.getTrace();
         Assert.assertTrue(trace.contains("17-Body-877\n"));
         trace = trace.replace("17-Body-877\n", "");
         Assert.assertTrue(trace.contains("19-Body-1170\n"));