[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/apps/castor/src/main/java/org/onosproject/castor/Castor.java b/apps/castor/src/main/java/org/onosproject/castor/Castor.java
index 7b32f2a..d190d2a 100644
--- a/apps/castor/src/main/java/org/onosproject/castor/Castor.java
+++ b/apps/castor/src/main/java/org/onosproject/castor/Castor.java
@@ -15,11 +15,11 @@
  */
 package org.onosproject.castor;
 
-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.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.onosproject.app.ApplicationService;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.CoreService;
@@ -38,13 +38,13 @@
     public static final String CASTOR_APP = "org.onosproject.castor";
     private final Logger log = getLogger(getClass());
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected CoreService coreService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ApplicationService applicationService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected IntentSynchronizationService intentSynchronizer;
 
     private ApplicationId appId;