add wildcard warnings (#5030)

Signed-off-by: Chris O'Haver <cohaver@infoblox.com>

plugin/kubernetes/kubernetes.go

@@ -86,6 +86,7 @@ var (
 	errNoItems        = errors.New("no items found")
 	errNsNotExposed   = errors.New("namespace is not exposed")
 	errInvalidRequest = errors.New("invalid query name")
+	wildCount         uint64
 )
 
 // Services implements the ServiceBackend interface.