Automated RPD host relearn.

Change-Id: Ia501ca80c448a7f8f9c31dc2b6513c739d69be6d
diff --git a/apps/dhcprelay/app/src/main/java/org/onosproject/dhcprelay/OsgiPropertyConstants.java b/apps/dhcprelay/app/src/main/java/org/onosproject/dhcprelay/OsgiPropertyConstants.java
index 7e794fe..207f766 100644
--- a/apps/dhcprelay/app/src/main/java/org/onosproject/dhcprelay/OsgiPropertyConstants.java
+++ b/apps/dhcprelay/app/src/main/java/org/onosproject/dhcprelay/OsgiPropertyConstants.java
@@ -29,6 +29,12 @@
     static final String DHCP_FPM_ENABLED = "dhcpFpmEnabled";
     static final boolean DHCP_FPM_ENABLED_DEFAULT = false;
 
+    static final String DHCP_PROBE_INTERVAL = "dhcpHostRelearnProbeInterval";
+    static final int DHCP_PROBE_INTERVAL_DEFAULT = 500;
+
+    static final String DHCP_PROBE_COUNT = "dhcpHostRelearnProbeCount";
+    static final int DHCP_PROBE_COUNT_DEFAULT = 3;
+
     static final String LEARN_ROUTE_FROM_LEASE_QUERY = "learnRouteFromLeasequery";
     static final boolean LEARN_ROUTE_FROM_LEASE_QUERY_DEFAULT = false;
 }