Update git submodules

* Update docs/submodules/snaps from branch 'stable/fraser'
  - Switch to OS::Neutron::FloatingIPAssociation

    OS::Nova::FloatingIPAssociation is hugely deprecated and doesn't work
    with latest OpenStack Queens deliverables.

    Change-Id: Icc43ba8a3466efbcc03e190b7e56f84eb69b7e51
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>
    (cherry picked from commit 89a0e76315c0ec123e3674536fcda07a6c9c3c06)

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 87cbb3f..1563036 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 87cbb3f40576ee913a640acbf49d55e430648a73
+Subproject commit 1563036f91ec584834c1be273a2b6527d70da2e0