Update git submodules

* Update docs/submodules/apex from branch 'stable/euphrates'
  - Fixes BgpVpn service name and tht fixes

    BgpVpn service was spelled incorrectly and there were syntax issues with
    the corresponding heat templates.

    apex-tripleo-heat-templates: If39072c687dcfb3fcb5c2dab33ecc3755b3396df

    Change-Id: I94155f4a32af2338bcd58afe3fb602860346a555
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit ff7707530cc80b0d2d039029f97a5ab0048353d4)

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 4773a61..40eedda 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 4773a61c540fcd2e5195abfa467122613ab30728
+Subproject commit 40eedda05c1757b3b0810ac088c1b067fa325dd1