[Trival] Fix wrong microversion in TestClass name

Change-Id: I0dce3963c7726cf126ad2c4b3e25f005fdd12790

Author: 1049965823

nova/tests/functional/api_sample_tests/test_servers.py

@@ -662,7 +662,7 @@ def test_server_rebuild(self):
         self._verify_response('server-action-rebuild-resp', subs, resp, 202)
 
 
-class ServersUpdateSampleJson289Test(ServersUpdateSampleJsonTest):
+class ServersUpdateSampleJson290Test(ServersUpdateSampleJsonTest):
     microversion = '2.90'
     scenarios = [('v2_90', {'api_major_version': 'v2.1'})]