Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Missed an update to swap neutron out for openstack cli"
  - Missed an update to swap neutron out for openstack cli

    APEX-432

    Change-Id: I787ce844d0d585f55d2267a57642e35f2a47bd40
    Signed-off-by: Dan Radez <dradez@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 0ea79cc..78a6e38 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 0ea79ccda01ea235ea3171273e8ee02dfc4ab2a9
+Subproject commit 78a6e3805d566f1061808fc62ea1e3f470e02c2d