Remove extra body kwarg in secrets endpoint tests

[telday]

Is your feature request related to a problem? Please describe.

Currently as a workaround to an OpenAPI generator issue we need to include an extra body="" kwarg in calls to the createSecret operation when using the expirations option. This should be fixed as soon as the OpenAPI bug is fixed.

Example

[izgeri]

@telday is this fixed? can the issue be closed?