Fix for ONOS-1595 - return proper status (405) when using an unsupported method

Change-Id: I66fe2d4783364d5a5b8cccba15115c818ed3a3b3
diff --git a/web/api/src/main/webapp/WEB-INF/web.xml b/web/api/src/main/webapp/WEB-INF/web.xml
index ba7e65f..82ad21e 100644
--- a/web/api/src/main/webapp/WEB-INF/web.xml
+++ b/web/api/src/main/webapp/WEB-INF/web.xml
@@ -60,6 +60,7 @@
                 org.onosproject.rest.exceptions.NotFoundMapper,
                 org.onosproject.rest.exceptions.ServerErrorMapper,
                 org.onosproject.rest.exceptions.BadRequestMapper,
+                org.onosproject.rest.exceptions.WebApplicationExceptionMapper,
                 org.onosproject.rest.JsonBodyWriter,
 
                 org.onosproject.rest.ApplicationsWebResource,