Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[maas] Conform regex to machines status output"
  - [maas] Conform regex to machines status output

    Change-Id: Icc30d27951abb1e231c9269c6293782a39e08fb6
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 36a3c2f..90f8b0e 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 36a3c2f40e49c51fb180cd03817aad1891e6f45e
+Subproject commit 90f8b0e41c000855ab2951fa9df1d913a67b3b2c