Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Fixes OVN scenario"
  - Fixes OVN scenario

    The OVN scenario would not deploy due to failures in trying to upgrades
    to OVS 2.8 from OVS 2.7

    JIRA: APEX-594.

    Change-Id: Id84e488da8d2335f2240930c68119d0e2f6faf9c
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index e4c83fb..bfe5aaa 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit e4c83fb13fe0f4bfee23fd044e662961acb62908
+Subproject commit bfe5aaa753e0ba5397b68e72b99057950db12b86