@Override
    protected AddRepositoryVersionRequestAuditEvent newAuditEvent() {
      return new AddRepositoryVersionRequestAuditEvent(this);
    }
Details of the repositories
os type -> list of repositories, where a repository is a key-value map of the properties (repo_id, repo_name, base_url)
ambari-server/src/main/java/org/apache/ambari/server/audit/event/request/AddRepositoryVersionRequestAuditEvent.java