Make Servlet field final, as required by Sonar.

src/main/java/no/priv/bang/debugutils/PostBodyCaptureServlet.java

@@ -34,7 +34,7 @@
 @Component(service={Servlet.class}, property={"alias=/post-body-capture"} )
 public class PostBodyCaptureServlet extends HttpServlet {
     private static final long serialVersionUID = 1L;
-    private LogServiceAdapter logservice = new LogServiceAdapter();
+    private final LogServiceAdapter logservice = new LogServiceAdapter();
 
     @Reference
     public void setLogservice(LogService logservice) {