Update git submodules

Update git submodules

* Update docs/submodules/fuel from branch 'stable/euphrates'
  - Merge "Switch nofeature-ha compute nodes to UCA repo" into stable/euphrates
  - Switch nofeature-ha compute nodes to UCA repo

    Employ UCA repo on computes nodes for nosdn-nofeature-ha scenario as
    well to prevent a regression (creation of ports failed for 1+n instances)
    of neutron ovs agent from mcp/openstack repos.

    Change-Id: Ie65ae122096c0d3a93c09d46191787a934bd7d4f
    Signed-off-by: Michael Polenchuk <mpolenchuk@mirantis.com>
    (cherry picked from commit 8ba3a1a4ed0ce41a76fa6d712778904bb56b60ac)