Add description to all types for documentation
Add description to all types for documentation

Currently the RAPI documentation uses the __str__ of the "types" defined
in ganeti.ht, but some of them are not described. This leads to
descriptions like 'Tuple of ((<Integer <function TInt at
0x2e75578>[...]' (as seen on the official documentation).

Signed-off-by: Aaron Karper <99cc1031546340b2b8ced5fe338b5890677a56ca@google.com>
Reviewed-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>

bitemyapp/ganeti,andir/ganeti,dimara/ganeti,yiannist/ganeti,ganeti/ganeti,onponomarev/ganeti,leshchevds/ganeti,yiannist/ganeti,mbakke/ganeti,apyrgio/ganeti,apyrgio/ganeti,grnet/snf-ganeti,dimara/ganeti,mbakke/ganeti,leshchevds/ganeti,yiannist/ganeti,andir/ganeti,ganeti/ganeti,onponomarev/ganeti,bitemyapp/ganeti,ganeti/ganeti,grnet/snf-ganeti,andir/ganeti,leshchevds/ganeti,mbakke/ganeti