Role specific ExtraConfig parameters not being applied correctly

Issue

<role>ExtraConfig parameters are not being applied correctly after deployment.

Example:

• Environment file templates/extra_config.yaml included in the deployment command contains:

  ...
  ComputeExtraConfig:
    NovaLibvirtCPUMode:
    - host-passthrough
    NovaReservedHostMemory: 40960
  ...
  

• After deployment, checking in the compute node:

  # egrep '^reserved_host_memory|^cpu_mode=' /var/lib/config-data/puppet-generated/nova_libvirt/etc/nova/nova.conf
  reserved_host_memory_mb=4096
  cpu_mode=host-model