Attached log extract on exact error.

Steps to reproduce:

• Create a VMware compute resource.
• Create a new vm with default options except for resource pool and host password.
• On first submit it will say mac not set (regardless if you set it or not, see attached photo)
• On second submit the merge issue appears (see the second attached photo)

About the setup:

Foreman is standalone and not joined to a domain, neither is the VMware host.
OS is Ubuntu 16.04 kernel 4.4.0-81-generic
Ruby Version: 2.3.1p112 (2016-04-26) [x86_64-linux-gnu]

Goal: Setup auto provision of VM's from Foreman to Vmware.