[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/core/net/src/main/java/org/onosproject/cluster/impl/MembershipManager.java b/core/net/src/main/java/org/onosproject/cluster/impl/MembershipManager.java
index 5daa03e..db125bf 100644
--- a/core/net/src/main/java/org/onosproject/cluster/impl/MembershipManager.java
+++ b/core/net/src/main/java/org/onosproject/cluster/impl/MembershipManager.java
@@ -15,21 +15,8 @@
  */
 package org.onosproject.cluster.impl;
 
-import java.util.Collection;
-import java.util.Map;
-import java.util.Objects;
-import java.util.Optional;
-import java.util.Set;
-import java.util.stream.Collectors;
-
 import com.google.common.collect.Maps;
 import com.google.common.collect.Sets;
-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.cluster.ClusterService;
 import org.onosproject.cluster.ControllerNode;
 import org.onosproject.cluster.Member;
@@ -37,20 +24,31 @@
 import org.onosproject.cluster.MembershipService;
 import org.onosproject.cluster.NodeId;
 import org.onosproject.core.Version;
+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;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.Set;
+import java.util.stream.Collectors;
+
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Cluster membership manager.
  */
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = MembershipService.class)
 public class MembershipManager implements MembershipService {
 
     private final Logger log = getLogger(getClass());
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ClusterService clusterService;
 
     private Member localMember;