Any new Cinder driver we add that doesn't have the "get_driver_options"
method defined will break the driver list generation tools.
The reason why it breaks them is because this method must be static, yet
our base driver class doesn't define it as static.
This patch:
- Sets the base method as static to prevent new drivers from breaking
the tools.
- Documents the existence of this method for driver developers.
- Adds get_driver_options method for drivers that are missing it.
- Fix macrosan_client help message that breaks the doc building process.
Closes-Bug: #1838225
Change-Id: I4797724d7b55709f0903d522b0233242b867146d
2f0bd74604