Change HTTP methods for OpenStack CDN
diff --git a/openstack/cdn/v1/base/requests.go b/openstack/cdn/v1/base/requests.go
index 4169e8c..dd221bc 100644
--- a/openstack/cdn/v1/base/requests.go
+++ b/openstack/cdn/v1/base/requests.go
@@ -6,16 +6,14 @@
 // entire API.
 func Get(c *gophercloud.ServiceClient) GetResult {
 	var res GetResult
-	_, res.Err = c.Request("GET", getURL(c), gophercloud.RequestOpts{
-		JSONResponse: &res.Body,
-	})
+	_, res.Err = c.Get(getURL(c), &res.Body, nil)
 	return res
 }
 
 // Ping retrieves a ping to the server.
 func Ping(c *gophercloud.ServiceClient) PingResult {
 	var res PingResult
-	_, res.Err = c.Request("GET", pingURL(c), gophercloud.RequestOpts{
+	_, res.Err = c.Get(pingURL(c), nil, &gophercloud.RequestOpts{
 		OkCodes:     []int{204},
 		MoreHeaders: map[string]string{"Accept": ""},
 	})