Added cache-control header to objectstore
diff --git a/openstack/objectstorage/v1/objects/requests.go b/openstack/objectstorage/v1/objects/requests.go
index f85add0..8c5d4bc 100644
--- a/openstack/objectstorage/v1/objects/requests.go
+++ b/openstack/objectstorage/v1/objects/requests.go
@@ -155,6 +155,7 @@
 // CreateOpts is a structure that holds parameters for creating an object.
 type CreateOpts struct {
 	Metadata           map[string]string
+	CacheControl       string `h:"Cache-Control"`
 	ContentDisposition string `h:"Content-Disposition"`
 	ContentEncoding    string `h:"Content-Encoding"`
 	ContentLength      int64  `h:"Content-Length"`