As a follow-up from a discussion with Munir, the VNF Heat Template Requirements for ONAP on page 8 (page 13 of pdf doc) will be updated in order to reflect that the SDC ONAP version includes the code for 3 levels of nesting as confirmed by David Shadmi.

Link to the document:

https://wiki.onap.org/download/attachments/1015849/VNF%20Heat%20Template%20Requirements%20for%20OpenECOMP.pdf?api=v2

Reference to the discussion

https://lists.onap.org/pipermail/onap-discuss/2017-April/000070.html