Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - lib.sh: cleanup_vms: Also remove VMs that use UEFI

    Pass `--nvram` to `virsh undefine`, so guest VMs booted using
    UEFI (OVMF on x86 or AAVMF on AArch64) can be destroyed.
    This does not affect VMs without UEFI.

    While at it, fix logical error in previous commit adding support
    for cleaning up stopped VMs.

    Change-Id: I44c20566469f29a8683d81e3641c69da572ccd4e
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>