convert to resource tracked create_server

convert this test to the resource tracked version of create_server
to simplify cleanup.

Change-Id: I270f61c58fcac49f4b68cba0c2a492b70a280de4
diff --git a/tempest/tests/compute/servers/test_create_server.py b/tempest/tests/compute/servers/test_create_server.py
index 3c8aeda..aaab9fa 100644
--- a/tempest/tests/compute/servers/test_create_server.py
+++ b/tempest/tests/compute/servers/test_create_server.py
@@ -46,24 +46,17 @@
         personality = [{'path': '/test.txt',
                        'contents': base64.b64encode(file_contents)}]
         cls.client = cls.servers_client
-        cli_resp = cls.client.create_server(cls.name,
-                                            cls.image_ref,
-                                            cls.flavor_ref,
-                                            meta=cls.meta,
-                                            accessIPv4=cls.accessIPv4,
-                                            accessIPv6=cls.accessIPv6,
-                                            personality=personality,
-                                            disk_config=cls.disk_config)
+        cli_resp = cls.create_server(name=cls.name,
+                                     meta=cls.meta,
+                                     accessIPv4=cls.accessIPv4,
+                                     accessIPv6=cls.accessIPv6,
+                                     personality=personality,
+                                     disk_config=cls.disk_config)
         cls.resp, cls.server_initial = cli_resp
         cls.password = cls.server_initial['adminPass']
         cls.client.wait_for_server_status(cls.server_initial['id'], 'ACTIVE')
         resp, cls.server = cls.client.get_server(cls.server_initial['id'])
 
-    @classmethod
-    def tearDownClass(cls):
-        cls.client.delete_server(cls.server_initial['id'])
-        super(ServersTestJSON, cls).tearDownClass()
-
     @attr(type='smoke')
     def test_create_server_response(self):
         # Check that the required fields are returned with values