Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[baremetal] Retry cinder.controller on failure"
  - [baremetal] Retry cinder.controller on failure

    Occasionally, cinderng.volume_type_present errors with:
    ClientException: Service Unavailable (HTTP 503)
    Instead of retrying the whole state file, use `wait_for` macro
    to retry only this high state up to 5 times.

    Change-Id: Ib9ef017aca737e53c853007c13107d56d856c016
    Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index c0541b1..052af82 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit c0541b17b817fbb2a017abea7cde4efad80b116f
+Subproject commit 052af82aa875dd6acf4a060484780e50b21448af