Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Revert "Horizon: service: Default to v2 API"

    Pike Horizon packages contain the fix for full v3 compatibility.
    Also update the reclass models to use v3 API.

    JIRA: FUEL-284

    This reverts commit 68ff467c4c2d9d0f201e2912c97616402f8109a3.

    Change-Id: I7795197100a67f892889eefce73252ec90d289cc
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 4d4149f..37dfdda 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 4d4149faa5604836931c039ad1922f95a764bb76
+Subproject commit 37dfddad367c8a13044a98f5f285224650bfe2de