Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[noha] Adopt vPDF usage"
  - [noha] Adopt vPDF usage

    Previously, all virtual deployments relied on lab configuration from
    <./mcp/config> using 'local-virtual1' as POD name.
    To keep using that default sample config, one can still pass the
    appropiate arguments to <ci/deploy.sh> as in:
    $ ./ci/deploy.sh -l local -p virtual1 [...]

    This changed introduces support for vPOD-specific lab config, e.g.:
    $ ./ci/deploy.sh -l ericsson -p virtual4

    Change-Id: I6ecb8e71d7e923e4b29b4ab0693c1afa5e19b582
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 8329a68..d151d43 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 8329a68c3cd49db8a31ef16f592b6efffc038958
+Subproject commit d151d4342aa828e0f4c94e7390262080686fcfa3