Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - [baremetal] curtin: Bump salt-minion to 2016.11

    By default, MaaS formula will install Salt minion 2016.3 via curtin
    on physical nodes. 2016.3 does not properly support proxy_host
    config option, causing timeouts during `linux.system.repo` SLS apply.

    Change-Id: I3d6245f0d4b425170c43b3b62a21ad9acc6cb97e
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 9a6e655..6e0e518 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 9a6e655e0b851ff6e449027c01ac1a66188b0064
+Subproject commit 6e0e518d43cecfb8f981dbd51326d8eae103720c