CLOUDSTACK-2921: Added more logging to attach failure

Also reduced size of attached disk to 1GB

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
CLOUDSTACK-4015: don't insert the fake template record when upgrade from 304 to 305
Cloudstack-3753 Multiple VLAN range API need to accept a list rather than "add" or "remove" per command
Reviewed-by: Alena Prokharchyk