Update git submodules

* Update docs/submodules/fuel from branch 'master'
  - Merge "[baremetal] public gateway setup on prx nodes"
  - [baremetal] public gateway setup on prx nodes

    - prx: add route for public traffic to public interface
    - prx: add route towards salt master through maas
    - remove dashboard class from proxy node (already implements horizon)
    - remove dashboard (and benchmark) class definitions (no longer used)
    - (temporary) backport Pharos change for adapter template

    JIRA: FUEL-305

    Change-Id: Ia14a18ac0123c1134d8d99dc43da9a1f770001d0
    Signed-off-by: Guillermo Herrero <guillermo.herrero@enea.com>

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index d7927a5..77609e7 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit d7927a5e63e5314c2a81970150b849b0b9d0bd49
+Subproject commit 77609e7fcebc76f4e10a133354787ad5086c0450