[WIP] Upgrade ONOS to karaf version 4.2.1

Change-Id: I7cd40c995bdf1c80f94b1895fb3344e32404c7fa
diff --git a/providers/ovsdb/tunnel/src/main/java/org/onosproject/ovsdb/provider/tunnel/OvsdbTunnelProvider.java b/providers/ovsdb/tunnel/src/main/java/org/onosproject/ovsdb/provider/tunnel/OvsdbTunnelProvider.java
index 264e05b..af919b1 100644
--- a/providers/ovsdb/tunnel/src/main/java/org/onosproject/ovsdb/provider/tunnel/OvsdbTunnelProvider.java
+++ b/providers/ovsdb/tunnel/src/main/java/org/onosproject/ovsdb/provider/tunnel/OvsdbTunnelProvider.java
@@ -15,14 +15,6 @@
  */
 package org.onosproject.ovsdb.provider.tunnel;
 
-import static org.slf4j.LoggerFactory.getLogger;
-
-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.incubator.net.tunnel.Tunnel;
 import org.onosproject.incubator.net.tunnel.TunnelDescription;
 import org.onosproject.incubator.net.tunnel.TunnelId;
@@ -33,18 +25,24 @@
 import org.onosproject.net.Path;
 import org.onosproject.net.provider.AbstractProvider;
 import org.onosproject.net.provider.ProviderId;
+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 static org.slf4j.LoggerFactory.getLogger;
+
 /**
  * Provider which uses when tunnel added/removed.
  */
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = TunnelProvider.class)
 public class OvsdbTunnelProvider extends AbstractProvider
         implements TunnelProvider {
     private final Logger log = getLogger(getClass());
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected TunnelProviderRegistry providerRegistry;
 
     private TunnelProviderService providerService;