Implement "sleep" function into zabbix JS engine

It would be nice to have "sleep" function in Zabbix JS engine.

Use case:

It would be useful in web-hooks in the case when working with 2 separate services, but services have a delay between data flow.

For example, client have 2 service desk systems, and task creates in fist one, but register in second one in 5-10 seconds, so making 5 second pause between creating task and getting it ID is necessary.