Fix error in configure_nova_hypervisor with hardware Ironic node

Trying to deploy OpenStack environment consisting of ironic nova
hypervisor & hardware Ironic node (not VM Ironic node) with devstack
got failed.

Devstack error says error occurred while calling configure_libvirt
in configure_nova_hypervisor. This happens because libvirt related
packages are not installed when specifying "VIRT_DRIVER=ironic"
and "IRONIC_IS_HARDWARE=True".

To fix this problem, this commit add "if" statement to check
Ironic node is hardware or not using "is_ironic_hardware" function
in "function-common" file.

Change-Id: I1113478175fadec79d0f8bf6ae842ed86e5e686b
Closes-Bug: #1834985
1 file changed