[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/core/net/src/main/java/org/onosproject/net/intent/impl/installer/FlowObjectiveIntentInstaller.java b/core/net/src/main/java/org/onosproject/net/intent/impl/installer/FlowObjectiveIntentInstaller.java
index 84717e4..8c9151e 100644
--- a/core/net/src/main/java/org/onosproject/net/intent/impl/installer/FlowObjectiveIntentInstaller.java
+++ b/core/net/src/main/java/org/onosproject/net/intent/impl/installer/FlowObjectiveIntentInstaller.java
@@ -19,11 +19,11 @@
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
 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.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.net.DeviceId;
 import org.onosproject.net.flowobjective.FilteringObjective;
 import org.onosproject.net.flowobjective.FlowObjectiveService;
@@ -63,16 +63,16 @@
     private static final String UNSUPPORT_OBJ = "unsupported objective {}";
     private final Logger log = getLogger(IntentManager.class);
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected IntentExtensionService intentExtensionService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected ObjectiveTrackerService trackerService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected IntentInstallCoordinator intentInstallCoordinator;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected FlowObjectiveService flowObjectiveService;
 
     @Activate