Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[infra] Bind mas01 mcpcontrol DHCP to MAAS_IP"
  - [infra] Bind mas01 mcpcontrol DHCP to MAAS_IP

    Bring back MAAS_IP global env var and use it for mas01 VM IP addr
    in mcpcontrol network to prevent salt minion signature change.

    Partially-reverts: b666bc50

    Change-Id: I5c7668393fe66287bd3ecdc75dd3195d5a89a8f3
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 857797a..7099ffc 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 857797a2c50d20299dac43135bd8f688905b9d37
+Subproject commit 7099ffcba4c7a84dfd2ac53fd59149948665f884