* Convert some inner classes to static (findbugs)

core/java/src/net/i2p/data/i2cp/RequestLeaseSetMessage.java

@@ -156,7 +156,7 @@ public class RequestLeaseSetMessage extends I2CPMessageImpl {
         return buf.toString();
     }
 
-    private class TunnelEndpoint {
+    private static class TunnelEndpoint {
         private Hash _router;
         private TunnelId _tunnelId;
 
@@ -186,4 +186,4 @@ public class RequestLeaseSetMessage extends I2CPMessageImpl {
             _tunnelId = tunnelId;
         }
     }
-}
+}