FELIX-916 Use string constant instead of LogService class to register ServiceTracker

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@740435 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/webconsole/src/main/java/org/apache/felix/webconsole/internal/Logger.java b/webconsole/src/main/java/org/apache/felix/webconsole/internal/Logger.java
index 2d8e4b4..8d2f0c5 100644
--- a/webconsole/src/main/java/org/apache/felix/webconsole/internal/Logger.java
+++ b/webconsole/src/main/java/org/apache/felix/webconsole/internal/Logger.java
@@ -27,12 +27,14 @@
 public class Logger
 {
 
+    private static final String LOGSERVICE_NAME = "org.osgi.service.log.LogService";
+    
     private ServiceTracker logTracker;
 
 
     public Logger( BundleContext bundleContext )
     {
-        logTracker = new ServiceTracker( bundleContext, LogService.class.getName(), null );
+        logTracker = new ServiceTracker( bundleContext, LOGSERVICE_NAME, null );
         logTracker.open();
     }