Add 'instance_uuid' in show baremetal schema

Show baremetal node API response includes the 'instance_uuid'
also so its schema should also includes the same.

This commit adds 'instance_uuid' in show baremetal node schema.

Change-Id: I863df5a8718cf2870398e7de0429d2e80bb72852
diff --git a/tempest/api_schema/response/compute/baremetal_nodes.py b/tempest/api_schema/response/compute/baremetal_nodes.py
index e82792c..82506e7 100644
--- a/tempest/api_schema/response/compute/baremetal_nodes.py
+++ b/tempest/api_schema/response/compute/baremetal_nodes.py
@@ -12,6 +12,8 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import copy
+
 node = {
     'type': 'object',
     'properties': {
@@ -41,7 +43,7 @@
     }
 }
 
-get_baremetal_node = {
+baremetal_node = {
     'status_code': [200],
     'response_body': {
         'type': 'object',
@@ -51,3 +53,8 @@
         'required': ['node']
     }
 }
+get_baremetal_node = copy.deepcopy(baremetal_node)
+get_baremetal_node['response_body']['properties']['node'][
+    'properties'].update({'instance_uuid': {'type': ['string', 'null']}})
+get_baremetal_node['response_body']['properties']['node'][
+    'required'].append('instance_uuid')