Fix duplicated provider id

Change-Id: Ibfa2ec9fe609c2f48ccc5e796544986d84e96a60
diff --git a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp4HandlerImpl.java b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp4HandlerImpl.java
index 235b4c5..39e53ff 100644
--- a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp4HandlerImpl.java
+++ b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp4HandlerImpl.java
@@ -89,6 +89,8 @@
 @Service
 @Property(name = "version", value = "4")
 public class Dhcp4HandlerImpl implements DhcpHandler, HostProvider {
+    public static final String DHCP_V4_RELAY_APP = "org.onosproject.Dhcp4HandlerImpl";
+    public static final ProviderId PROVIDER_ID = new ProviderId("dhcp4", DHCP_V4_RELAY_APP);
     private static Logger log = LoggerFactory.getLogger(Dhcp4HandlerImpl.class);
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
@@ -1013,7 +1015,7 @@
 
     @Override
     public ProviderId id() {
-        return DhcpRelayManager.PROVIDER_ID;
+        return PROVIDER_ID;
     }
 
     class InternalHostListener implements HostListener {
diff --git a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp6HandlerImpl.java b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp6HandlerImpl.java
index c247b90..50fd8be 100644
--- a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp6HandlerImpl.java
+++ b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/Dhcp6HandlerImpl.java
@@ -92,6 +92,8 @@
 @Service
 @Property(name = "version", value = "6")
 public class Dhcp6HandlerImpl implements DhcpHandler, HostProvider {
+    public static final String DHCP_V6_RELAY_APP = "org.onosproject.Dhcp6HandlerImpl";
+    public static final ProviderId PROVIDER_ID = new ProviderId("dhcp4", DHCP_V6_RELAY_APP);
     private static Logger log = LoggerFactory.getLogger(Dhcp6HandlerImpl.class);
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
@@ -328,7 +330,7 @@
 
     @Override
     public ProviderId id() {
-        return DhcpRelayManager.PROVIDER_ID;
+        return PROVIDER_ID;
     }
 
     @Override
diff --git a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java
index 97b19e7..6eca1e8 100644
--- a/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java
+++ b/apps/dhcprelay/src/main/java/org/onosproject/dhcprelay/DhcpRelayManager.java
@@ -96,7 +96,6 @@
 import org.onosproject.net.packet.PacketPriority;
 import org.onosproject.net.packet.PacketProcessor;
 import org.onosproject.net.packet.PacketService;
-import org.onosproject.net.provider.ProviderId;
 import org.osgi.service.component.ComponentContext;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -114,7 +113,6 @@
 @Service
 public class DhcpRelayManager implements DhcpRelayService {
     public static final String DHCP_RELAY_APP = "org.onosproject.dhcprelay";
-    public static final ProviderId PROVIDER_ID = new ProviderId("host", DHCP_RELAY_APP);
     public static final String ROUTE_STORE_IMPL =
             "org.onosproject.routeservice.store.RouteStoreImpl";
     private static final TrafficSelector DHCP_SERVER_SELECTOR = DefaultTrafficSelector.builder()