`host_set()` expects `status` and `maintenance_mode` as keyword
arguments, but in `SetHost.take_action()`, it is called without
expanding the keyword arguments.
So it's called as
```
host_set(host, {'status': 'enable'})
```
instead of
```
host_set(host, status='enable')
```
Change-Id: If0b37ac60091161a892bfc694fce31a988f66005
Task: 23023
fc76db0def