Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - ci/deploy.sh: Move global vars to separate file

    log.sh should also work as standalone script, so factor out
    global variables from <ci/deploy.sh> into <mcp/scripts/globals.sh>,
    which should be sourced by log.sh when required variables are not set.

    Change-Id: I5a5bb85ee5835f567d6910b11c137d95e2147714
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit 45b22fab76f84cdbf71a6693dc42f24edaa4334e)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 1423815..820721e 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 1423815e9c0bb31bbb7fba87017bb3a5df75e023
+Subproject commit 820721e04309d732e58b90b7a7d57db8136784e0