[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/core/net/src/main/java/org/onosproject/core/impl/VersionManager.java b/core/net/src/main/java/org/onosproject/core/impl/VersionManager.java
index faec87b..ea5fb99 100644
--- a/core/net/src/main/java/org/onosproject/core/impl/VersionManager.java
+++ b/core/net/src/main/java/org/onosproject/core/impl/VersionManager.java
@@ -15,6 +15,13 @@
  */
 package org.onosproject.core.impl;
 
+import org.onosproject.core.Version;
+import org.onosproject.core.VersionService;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
@@ -22,19 +29,10 @@
 import java.nio.file.Paths;
 import java.util.List;
 
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Service;
-import org.onosproject.core.Version;
-import org.onosproject.core.VersionService;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 /**
  * Node version service implementation.
  */
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = VersionService.class)
 public class VersionManager implements VersionService {
 
     private final Logger log = LoggerFactory.getLogger(getClass());