Update to use newer jenkins-test-harness.

Use one that enables stack traces for tests that rely on it for easier development and troubleshooting.
Only in incrementals so far.

pom.xml

@@ -28,7 +28,7 @@ THE SOFTWARE.
   <parent>
     <groupId>org.jenkins-ci</groupId>
     <artifactId>jenkins</artifactId>
-    <version>1.52</version>
+    <version>1.54</version>
     <relativePath />
   </parent>
 

test/pom.xml

@@ -70,7 +70,7 @@ THE SOFTWARE.
     <dependency>
       <groupId>${project.groupId}</groupId>
       <artifactId>jenkins-test-harness</artifactId>
-      <version>2.59</version>
+      <version>2.62-rc1311.681a1adc1757</version>
       <scope>test</scope>
       <exclusions>
         <exclusion>