Remote.hostname doesn't have to be a property

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Make Remote.shortname actually short

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>
Use Remote.shortname in logs

Signed-off-by: Zack Cerza <zack.cerza@inktank.com>