port-create expects node INT, not STR

[aeva black]

$ ironic node-list
+--------------------------------------+---------------+-------------+--------------------+
| UUID | Instance UUID | Power State | Provisioning State |
+--------------------------------------+---------------+-------------+--------------------+
| fbe3835c-0dfc-4ec0-a693-44a7b7dd4439 | None | None | None |
+--------------------------------------+---------------+-------------+--------------------+

$ ironic port-create -a 'xx:xx:xx:xx:xx:xx' -n fbe3835c-0dfc-4ec0-a693-44a7b7dd4439
node_id: Wrong type. Expected '<type 'int'>', got '<type 'str'>'

$ ironic port-create -a 'xx:xx:xx:xx:xx:xx' --node_id fbe3835c-0dfc-4ec0-a693-44a7b7dd4439
node_id: Wrong type. Expected '<type 'int'>', got '<type 'str'>'

[Lucas Alvares Gomes (lucasagomes)]

stack@stack-virtual-machine:~/devstack$ ironic --ironic-url=http://127.0.0.1:6385 port-create -a "AA:AA:AA:BB:BB:BB" -n 87e0c0c1-d117-4b7f-922f-1d26db77a625
+----------+--------------------------------------+
| Property | Value |
+----------+--------------------------------------+
| extra | {} |
| uuid | 3eae0b9d-1339-4a4e-8e69-7985e6ed17c4 |
| node_id | 87e0c0c1-d117-4b7f-922f-1d26db77a625 |
| address | AA:AA:AA:BB:BB:BB |
+----------+--------------------------------------+

Fixed commit review id: I84782268c4317b4eec53fdcdfc6cb2b901b22780