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>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 4651bb2..346b0c0 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 4651bb2a7257be49c9ca6ce5c959de66e6800005
+Subproject commit 346b0c0856ed53525e4d97cd06f3b8a9423d05f2