Adding REST APIs for DHCP Server

Change-Id: I59f44f5614cd5343a8313747dfb4071b9c126e7d
diff --git a/onos-app-dhcpserver/src/main/java/org/onosproject/dhcpserver/cli/DHCPRemoveStaticMapping.java b/onos-app-dhcpserver/src/main/java/org/onosproject/dhcpserver/cli/DHCPRemoveStaticMapping.java
index c238d12..e8f16a4 100644
--- a/onos-app-dhcpserver/src/main/java/org/onosproject/dhcpserver/cli/DHCPRemoveStaticMapping.java
+++ b/onos-app-dhcpserver/src/main/java/org/onosproject/dhcpserver/cli/DHCPRemoveStaticMapping.java
@@ -34,7 +34,7 @@
     String macAddr = null;
 
     private static final String DHCP_SUCCESS = "Static Mapping Successfully Removed.";
-    private static final String DHCP_FAILURE = "Static Mapping Failed. " +
+    private static final String DHCP_FAILURE = "Static Mapping Removal Failed. " +
                                                 "Either the mapping does not exist or it is not static.";
 
     @Override