[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/apps/kafka-integration/app/src/main/java/org/onosproject/kafkaintegration/kafka/KafkaConfigManager.java b/apps/kafka-integration/app/src/main/java/org/onosproject/kafkaintegration/kafka/KafkaConfigManager.java
index 79d7baf..aed8ba8 100644
--- a/apps/kafka-integration/app/src/main/java/org/onosproject/kafkaintegration/kafka/KafkaConfigManager.java
+++ b/apps/kafka-integration/app/src/main/java/org/onosproject/kafkaintegration/kafka/KafkaConfigManager.java
@@ -15,37 +15,35 @@
  */
 package org.onosproject.kafkaintegration.kafka;
 
-import static com.google.common.base.Strings.isNullOrEmpty;
-import static org.onlab.util.Tools.get;
-
-import java.util.Dictionary;
-
-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.Modified;
-import org.apache.felix.scr.annotations.Property;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
-import org.apache.felix.scr.annotations.Service;
 import org.onosproject.cfg.ComponentConfigService;
 import org.onosproject.kafkaintegration.api.KafkaConfigService;
 import org.onosproject.kafkaintegration.api.KafkaPublisherAdminService;
 import org.onosproject.kafkaintegration.api.dto.KafkaServerConfig;
 import org.osgi.service.component.ComponentContext;
+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.Modified;
+import org.osgi.service.component.annotations.Property;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-@Component(immediate = true)
-@Service
+import java.util.Dictionary;
+
+import static com.google.common.base.Strings.isNullOrEmpty;
+import static org.onlab.util.Tools.get;
+
+@Component(immediate = true, service = KafkaConfigService.class)
 public class KafkaConfigManager implements KafkaConfigService {
 
     private final Logger log = LoggerFactory.getLogger(getClass());
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ComponentConfigService componentConfigService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected KafkaPublisherAdminService kafkaPublisherAdminService;
 
     public static final String BOOTSTRAP_SERVERS = "localhost:9092";