tapi-notification.yang: inconsistent descriptions

[GermanoSMO]

There are inconsistent/meaningless descriptions in the tapi-notification.yang module:

An example is the notification-type (Line 246 and following): The descriptions for the OBJECT_CREATION enumerated value and for the notification type itself are not meaningul and refer to something into a totally different scope:

    typedef notification-type {
        type enumeration {
            enum OBJECT_CREATION {
          --->description "Not a normal state. The system is unable to determine the correct value.";**
            }
            enum OBJECT_DELETION {
                description "none";
            }
            enum ATTRIBUTE_VALUE_CHANGE {
                description "none";
            }
            enum ALARM_EVENT {
                description "none";
            }
            enum THRESHOLD_CROSSING_ALERT {
                description "none";
            }
        }
    --->description "The orientation of flow at the Port of a Forwarding entity";

The same for the description of the object-type (line 266 and following): typedef object-type { type enumeration { ...... } --->description "The orientation of flow at the Port of a Forwarding entity"; }