Fix usage of rest_client expected_success() in tests

rest_client expected_success() method expect read_code
must be int and states the same in doc string .

Tempest is converting that to error instead of false pass.
Details: I3f4c58bdbb172805514831103927d3464d65d7f3

Change-Id: Ic4b0af5701df99621e3abb693644c4824c92dc4c
diff --git a/ironic_tempest_plugin/services/baremetal/base.py b/ironic_tempest_plugin/services/baremetal/base.py
index 5b6dea8..edb9ecb 100644
--- a/ironic_tempest_plugin/services/baremetal/base.py
+++ b/ironic_tempest_plugin/services/baremetal/base.py
@@ -110,7 +110,7 @@
             uri += "?%s" % urllib.urlencode(kwargs)
 
         resp, body = self.get(uri)
-        self.expected_success(200, resp['status'])
+        self.expected_success(200, resp.status)
 
         return resp, self.deserialize(body)
 
@@ -126,7 +126,7 @@
         else:
             uri = self._get_uri(resource, uuid=uuid, permanent=permanent)
         resp, body = self.get(uri)
-        self.expected_success(200, resp['status'])
+        self.expected_success(200, resp.status)
 
         return resp, self.deserialize(body)
 
@@ -144,7 +144,7 @@
         uri = self._get_uri(resource)
 
         resp, body = self.post(uri, body=body)
-        self.expected_success(201, resp['status'])
+        self.expected_success(201, resp.status)
 
         return resp, self.deserialize(body)
 
@@ -159,7 +159,7 @@
         uri = self._get_uri(resource, uuid)
 
         resp, body = self.delete(uri)
-        self.expected_success(204, resp['status'])
+        self.expected_success(204, resp.status)
         return resp, body
 
     def _patch_request(self, resource, uuid, patch_object):
@@ -175,7 +175,7 @@
         patch_body = json.dumps(patch_object)
 
         resp, body = self.patch(uri, body=patch_body)
-        self.expected_success(200, resp['status'])
+        self.expected_success(200, resp.status)
         return resp, self.deserialize(body)
 
     @handle_errors
@@ -200,5 +200,5 @@
         put_body = json.dumps(put_object)
 
         resp, body = self.put(uri, body=put_body)
-        self.expected_success(202, resp['status'])
+        self.expected_success([202, 204], resp.status)
         return resp, body