[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/dpi/impl/DpiStatisticsManager.java b/incubator/net/src/main/java/org/onosproject/incubator/net/dpi/impl/DpiStatisticsManager.java
index b49c9cb..8aa02ec 100644
--- a/incubator/net/src/main/java/org/onosproject/incubator/net/dpi/impl/DpiStatisticsManager.java
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/dpi/impl/DpiStatisticsManager.java
@@ -17,14 +17,6 @@
 package org.onosproject.incubator.net.dpi.impl;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
-
-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.core.ApplicationId;
 import org.onosproject.core.CoreService;
 import org.onosproject.incubator.net.dpi.DpiStatInfo;
@@ -34,6 +26,11 @@
 import org.onosproject.incubator.net.dpi.ProtocolStatInfo;
 import org.onosproject.incubator.net.dpi.TrafficStatInfo;
 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.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 
 import java.io.BufferedReader;
@@ -63,8 +60,7 @@
 /**
  * DPI Statistics Manager.
  */
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = DpiStatisticsManagerService.class)
 public class DpiStatisticsManager implements DpiStatisticsManagerService {
 
     private ServerSocket serverSocket;
@@ -72,7 +68,7 @@
 
     private final Logger log = getLogger(getClass());
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected CoreService coreService;
 
     private ApplicationId appId;