Update git submodules

* Update docs/submodules/fuel from branch 'stable/fraser'
  - Merge "Disable cpu pinning & L3 HA features" into stable/fraser
  - Disable cpu pinning & L3 HA features

    * CPU pinning: tests have no support for dedicated CPU policy, so
      enabled pinning causes general performance impact
      [https://docs.openstack.org/nova/pike/admin/cpu-topologies.html]
    * L3 HA routers:
      - doesn't catch l3-agent failure, relies only on
        HA network state to spot failure
      - failover process only retains the state of network
        connections for instances with a floating IP address
      - incompatible with DVR mode

    JIRA: FUEL-360
    Change-Id: Ie0182bf953b9989729f89d705d9fee902d229e51
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit ed7bb355c93af5c163d5ae7926012652021abf75)

diff --git a/docs/submodules/fuel b/docs/submodules/fuel
index 9066a68..6e28bce 160000 (submodule)
--- a/docs/submodules/fuel
+++ b/docs/submodules/fuel
@@ -1 +1 @@
-Subproject commit 9066a682aed937d566f661e975070855aafe5d8f
+Subproject commit 6e28bcea8eca57d6befae2cd272a39564b0311e5