ActionAPIs with name "import" are broken due to using a reserved keyword

```
Python 3.8.10 (default, Mar 15 2022, 12:22:08)
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from maas.client.bones import SessionAPI
>>> credentials=['zbL4fkkuxqxhDRauv9', 'tfymrvVay9qZGJFAR9', 'A4dJNDB8LUNFKUWx46gtCdhsVAg8aSkB']
>>> client = SessionAPI.fromURL(url="http://192.168.61.8:5240/MAAS/api/2.0/",credentials=credentials, insecure=True)
>>> client.SSHKeys.import(keysource='gh:canozyurt')
File "", line 1
client.SSHKeys.import(keysource='gh:canozyurt')
^
SyntaxError: invalid syntax
>>>
```

I modified the API description json to export "import" action as "add" instead and published the json via 8080. I left the paths and URIs untouched so SessionAPI can still connect to the same MAAS instance.
```
{
"anon":null,
"auth":{
"actions":[
{
"method":"POST",
"name":"add",
"doc":"Import SSH keys\n\nImport the requesting user's SSH keys for a given protocol\nand authorization ID in protocol:auth_id format.\n\n:param keysource: Required. The source\nof the keys to import should be provided in the request payload as form\ndata:\n\nE.g.\n\n source:user\n\n- ``source``: lp (Launchpad), gh (GitHub)\n- ``user``: User login\n:type keysource: String\n\n ",
"op":"import",
"restful":false
},
{
"method":"GET",
"name":"read",
"doc":"List SSH keys\n\nList all keys belonging to the requesting user.\n\n",
"op":null,
"restful":true
},
{
"method":"POST",
"name":"create",
"doc":"Add a new SSH key\n\nAdd a new SSH key to the requesting or supplied user's\naccount.\n\n:param key: Required. A public SSH key\nshould be provided in the request payload as form data with the name\n'key':\n\n key: \"key-type public-key-data\"\n\n- ``key-type``: ecdsa-sha2-nistp256, ecdsa-sha2-nistp384,\n ecdsa-sha2-nistp521, ssh-dss, ssh-ed25519, ssh-rsa\n- ``public key data``: Base64-encoded key data.\n:type key: String\n\n ",
"op":null,
"restful":true
}
],
"doc":"Manage the collection of all the SSH keys in this MAAS.",
"name":"SSHKeysHandler",
"params":[

],
"path":"/MAAS/api/2.0/account/prefs/sshkeys/",
"uri":"http://192.168.61.8:5240/MAAS/api/2.0/account/prefs/sshkeys/"
},
"name":"SSHKeysHandler"
},
```

The request went through and returned success.

```
>>> client = SessionAPI.fromURL(url="http://192.168.61.8:8080/",credentials=credentials, insecure=True)
>>> client.SSHKeys.add(keysource='gh:canozyurt')
[{'key': 'ssh-rsa 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', 'keysource': 'gh:canozyurt', 'id': 7, 'resource_uri': '/MAAS/api/2.0/account/prefs/sshkeys/7/'}]
>>>
```
All other import actions available in other handlers seem affected too.