Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - patch.sh: Exit on patch apply failure

    Patches that fail to apply are silently skipped. Since retrying is
    not possible, deploy moves on, making the problem hard to observe.

    Change-Id: I3fe01cef6b245de53767a660b9b4fdfae0d5d0ff
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
    (cherry picked from commit bd0259e7bb5f045a1ba7958d79039848d062aad1)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 069c925..139aacf 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 069c9252e2850ab13a47cc252d1f9e0e410b9305
+Subproject commit 139aacf390d38b60f4fe4fd618a0bcf6b54b35cf