Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [HA] [cinder] Switch loop to free space on sda

    On cmp nodes, we assing 30G (fixed) to rootfs, use the rest for
    cinder.

    Note: AArch64 gets one extra partition (the EFI System Partition or
    ESP) on /dev/sda1 via MaaS.

    JIRA: FUEL-330

    Change-Id: I2a36107d074532b627bd2349cafc0c8ee61f500f
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
  - [salt.sh] Armband extra repo for forked reclass

    - add Armband nightly/extra DEB repository;
    - install forked and updated reclass 1.5.2 which includes:
      * better error reporting;
      * support for deleting existing keys during list interpolation;
      * various other improvements and optimizations;

    While at it, update copyright year for patches.

    JIRA: FUEL-345

    Change-Id: I00d8b625fe191648e7ea34b3dd4c8375691384e6
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 578aaad..f6f8a56 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 578aaada4233d2ef311112e684d8a22e64be3af1
+Subproject commit f6f8a56b40c5268d94cdb8e9aef6ea937f68a18e