[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/core/net/src/main/java/org/onosproject/net/key/impl/DeviceKeyManager.java b/core/net/src/main/java/org/onosproject/net/key/impl/DeviceKeyManager.java
index 647acf7b23..cc06f47 100644
--- a/core/net/src/main/java/org/onosproject/net/key/impl/DeviceKeyManager.java
+++ b/core/net/src/main/java/org/onosproject/net/key/impl/DeviceKeyManager.java
@@ -16,12 +16,6 @@
 
 package org.onosproject.net.key.impl;
 
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
-import org.apache.felix.scr.annotations.Service;
 import org.onosproject.event.AbstractListenerManager;
 import org.onosproject.net.key.DeviceKey;
 import org.onosproject.net.key.DeviceKeyAdminService;
@@ -31,6 +25,11 @@
 import org.onosproject.net.key.DeviceKeyService;
 import org.onosproject.net.key.DeviceKeyStore;
 import org.onosproject.net.key.DeviceKeyStoreDelegate;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 
 import java.util.Collection;
@@ -43,8 +42,7 @@
 /**
  * Implementation of device key services.
  */
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = { DeviceKeyService.class, DeviceKeyAdminService.class })
 public class DeviceKeyManager extends AbstractListenerManager<DeviceKeyEvent, DeviceKeyListener>
         implements DeviceKeyService, DeviceKeyAdminService {
 
@@ -52,7 +50,7 @@
 
     private DeviceKeyStoreDelegate delegate = this::post;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected DeviceKeyStore store;
 
     @Activate