Fix sql query
Fix update plugin
Acknowledge only if Shinken accepts ...

Acknowledge in Glpi DB did not take care of Shinken Web service response
Clean log
Component alias/description

Add a description field in a component to allow :
- a service_description in Shinken
- a display_name friendly name in Glpi interface
When description field is not empty, it is used as service_description
for Shinken. If empty, component name is used for Shinken and UI.