export and import processes use different names for refresh_token_rotation

[gianpaolo-tndigit]

To reproduce the bug:

1. Create a new client with refresh_token_rotation = true.
2. Export the client.

You will observe the following in the export:

refreshTokenRotation: true
refresh_token_rotation: true

However, if you import the client while resetting the ID, only refresh_token_rotation: true is accepted.