Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Fix missing root_helper_daemon for cmp, gtw

    While at it, drop patch now upstream.

    JIRA: FUEL-348

    Fixes: cf6cd9cd

    Change-Id: Ieb4c93e9dc79a4e4dec140433574e042a1a6f2dc
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 21f34da..9972139 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 21f34dab9380f98622c0075fa8f4b5868916a27f
+Subproject commit 9972139f91debfe24c8cb3cfcdfbc595619659e2