Skip case for fixing incorrect exception assertion

HTTP status code 413 should not used for some exception
response based on RFC2616.

Related nova commit: I2bb8a60ef254afbfed514cfeebe75355d0de4475
Related-Bug: #1298131

Change-Id: If376eda0a7929ba2baa4ac4acbb457883bcfc96d
diff --git a/tempest/api/compute/v3/admin/test_servers_negative.py b/tempest/api/compute/v3/admin/test_servers_negative.py
index a971463..5eb6395 100644
--- a/tempest/api/compute/v3/admin/test_servers_negative.py
+++ b/tempest/api/compute/v3/admin/test_servers_negative.py
@@ -54,6 +54,7 @@
             flavor_id = data_utils.rand_int_id(start=1000)
         return flavor_id
 
+    @test.skip_because(bug="1298131")
     @test.attr(type=['negative', 'gate'])
     def test_resize_server_using_overlimit_ram(self):
         flavor_name = data_utils.rand_name("flavor-")
@@ -67,11 +68,12 @@
                                                              ram, vcpus, disk,
                                                              flavor_id)
         self.addCleanup(self.flavors_client.delete_flavor, flavor_id)
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(exceptions.Unauthorized,
                           self.client.resize,
                           self.servers[0]['id'],
                           flavor_ref['id'])
 
+    @test.skip_because(bug="1298131")
     @test.attr(type=['negative', 'gate'])
     def test_resize_server_using_overlimit_vcpus(self):
         flavor_name = data_utils.rand_name("flavor-")
@@ -85,7 +87,7 @@
                                                              ram, vcpus, disk,
                                                              flavor_id)
         self.addCleanup(self.flavors_client.delete_flavor, flavor_id)
-        self.assertRaises(exceptions.OverLimit,
+        self.assertRaises(exceptions.Unauthorized,
                           self.client.resize,
                           self.servers[0]['id'],
                           flavor_ref['id'])