Reviewed-by: iustinp

It is impossible to keep backward compatibility due to
significant changes in the Ganeti core.

Reviewed-by: iustinp

It should be consistent.

Reviewed-by: amishchenko

Reviewed-by: imsnah

I broke it with rev 1864. This patch also removes whitespace at
line endings.

Reviewed-by: amishchenko

Add instance tag handling, improved error logging.
...oh, yes adopt instance listing for RAPI2!

Reviewed-by: iustinp

The RESTHTTPServer module went the way of the dodo.

Reviewed-by: iustinp

Reviewed-by: imsnah

Reviewed-by: iustinp

Reviewed-by: imsnah