Fix typo xpvnc in get_remote_console schema

The type enumeration value xpvnc is a typo, which should
be xvpvnc indeed.
https://developer.openstack.org/api-ref/compute/#create-remote-console

Change-Id: If97c1da830f8db77425262df70e70541c3946773
diff --git a/tempest/lib/api_schema/response/compute/v2_6/servers.py b/tempest/lib/api_schema/response/compute/v2_6/servers.py
index 29b3e86..934098f 100644
--- a/tempest/lib/api_schema/response/compute/v2_6/servers.py
+++ b/tempest/lib/api_schema/response/compute/v2_6/servers.py
@@ -31,7 +31,7 @@
                 'type': 'object',
                 'properties': {
                     'protocol': {'enum': ['vnc', 'rdp', 'serial', 'spice']},
-                    'type': {'enum': ['novnc', 'xpvnc', 'rdp-html5',
+                    'type': {'enum': ['novnc', 'xvpvnc', 'rdp-html5',
                                       'spice-html5', 'serial']},
                     'url': {
                         'type': 'string',