Show file system names in lower case.
Fixed alignment of tables with utf-8 characters.

For example, 'lmi storage tree' output had wrongly aligned columns, when they
contained utf-8 graphics.
Add [device] option to 'lmi mount show' and 'list'.
Show better error message when mount fails.
Rename 'lf' command to 'file'.

'lf' is not intuitive, it does not say anything to CIM newbies.
Fixed RAID tests.

- the RAID might be rebuilding when we query its status
- the RAID should not exists when we remove it