Add service listener to notify Kafka

Add service listener to notify Kafka

  - Implement a new listener 'ServiceListener' that sends a
    notification to the topic 'alarmservice' of the Kafka broker
    when a service breakdowns or is restored
  - Add a new RPC API named 'GetNotificationsAlarmService' to retrieve
    notifications from the topic 'alarmservice'
  - Add a new subscriber 'SubscriberAlarm' dedicated to read
    alarm notifications from topics Kafka
  - Add a new publisher 'PublisherAlarm' dedicated to write alarm
    notifications from topics Kafka
  - Update nbi-notifications unit tests

JIRA: TRNSPRTPCE-471
Signed-off-by: Thierry Jiao <thierry.jiao@orange.com>
Change-Id: I4b42c8a3282a805791ae6d9d046031dd385faaae