Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [reclass] noifupdown for cluster nodes PXE/admin

    Instead of applying PXE/admin static IPs via Salt right away,
    delay the transition from DHCP until after node reboot to avoid
    duplicate IPs and networking issues during deployment.

    Change-Id: I8a12d78a6b42edc9bcf9eb9ebc9590e2af5ec52c
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 9b38e04..91ca434 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 9b38e04de451a60da0bc8a685612282cd1b60ee6
+Subproject commit 91ca434abb10aa14488a6bcd467c8228ea149752