Blaine Gardner
76f1d9944e
Drive Groups will fail to deploy due to a message: `failed to parse
device list (""): failed to JSON unmarshal configured devices (""):
unexpected end of JSON input`
This is due to trying to JSON unmarshal an empty string which does not
contain any devices to provision when Drive Groups are specified. Fix so
that an empty string represents no non-Drive Group devices.
Signed-off-by: Blaine Gardner <blaine.gardner@suse.com>