+ """
+ Instantiate at RO
+ :param logging_text: preffix text to use at logging
+ :param nsr_id: nsr identity
+ :param nsd: database content of ns descriptor
+ :param db_nsr: database content of ns record
+ :param db_nslcmop: database content of ns operation, in this case, 'instantiate'
+ :param db_vnfrs:
+ :param db_vnfds_ref: database content of vnfds, indexed by id (not _id). {id: {vnfd_object}, ...}
+ :param n2vc_key_list: ssh-public-key list to be inserted to management vdus via cloud-init
+ :param stage: list with 3 items: [general stage, tasks, vim_specific]. This task will write over vim_specific
+ :return: None or exception
+ """