Remove unused parameter 'tenant_id'

When creating a server, tenant_id is not available at all
in a request body and the wrapper method also doesn't handle
the parameter value, the method just ignores it.
This patch removes it for cleanup.

Change-Id: I09f68e78ab760386d6201a0bc94699cab83c59d6
diff --git a/tempest/scenario/test_security_groups_basic_ops.py b/tempest/scenario/test_security_groups_basic_ops.py
index 1db1ac2..9afb598 100644
--- a/tempest/scenario/test_security_groups_basic_ops.py
+++ b/tempest/scenario/test_security_groups_basic_ops.py
@@ -245,7 +245,6 @@
             ],
             'key_name': tenant.keypair['name'],
             'security_groups': security_groups_names,
-            'tenant_id': tenant.creds.tenant_id,
             'network_client': tenant.manager.network_client
         }
         server = self.create_server(name=name, create_kwargs=create_kwargs)