meta should be metadata in rebuild server

this change the parameter of rebuild server from  meta to metadata.
currently the parameter meta has been ignored.

Closes-Bug: #1233040

Change-Id: I9009a8836e07496f5752956c28ee7d9b0b0e783e
diff --git a/tempest/api/compute/servers/test_server_actions.py b/tempest/api/compute/servers/test_server_actions.py
index 0d5a8fa..72ccb2d 100644
--- a/tempest/api/compute/servers/test_server_actions.py
+++ b/tempest/api/compute/servers/test_server_actions.py
@@ -117,7 +117,8 @@
         password = 'rebuildPassw0rd'
         resp, rebuilt_server = self.client.rebuild(self.server_id,
                                                    self.image_ref_alt,
-                                                   name=new_name, meta=meta,
+                                                   name=new_name,
+                                                   metadata=meta,
                                                    personality=personality,
                                                    adminPass=password)
 
@@ -225,7 +226,8 @@
         self.assertRaises(exceptions.NotFound,
                           self.client.rebuild,
                           999, self.image_ref_alt,
-                          name=new_name, meta=meta,
+                          name=new_name,
+                          metadata=meta,
                           personality=personality,
                           adminPass='rebuild')