Merge pull request #3943 from olamy/winstone_5_2

[JENKINS-56659] winstone 5.2 with timestamped version to build on ci

war/pom.xml

@@ -89,7 +89,7 @@ THE SOFTWARE.
       -->
       <groupId>org.jenkins-ci</groupId>
       <artifactId>winstone</artifactId>
-      <version>5.1</version>
+      <version>5.2</version>
       <scope>test</scope>
     </dependency>
     <dependency>