Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - lib.sh: persistent cfg01, mas01 mcpcontrol

    cfg01, mas01 DHCP leases in mcpcontrol virtual network should be
    persistent (if cfg01 IP changes, minions can't find Salt Master).

    Change-Id: I497207ebe1537af94fd92de12491664d17ad3144
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit a1c323835f808e6d729c645c8df75a43e51851fe)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 260ad11..e770336 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 260ad1174ad63d9f4c18040ee2dc924a61506778
+Subproject commit e770336f88637e6c0b51ba230b54837f9258414d