Initial commit of DLT7000/DLT8000 emulation

Signed-off-by: Mark Harvey <markh794@gmail.com>
Personality module: Rework initialise sequence

Found many of the personality modules ordered the initialisation
in different order. Although not a problem in itself, it is confusing
to read.

Signed-off-by: Mark Harvey <markh794@gmail.com>
Make up barcode 'rules' for DLT7k & 9x40 drives

Signed-off-by: Mark Harvey <markh794@gmail.com>