Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Removing symlinks to odl_l3 scenario files"
  - Removing symlinks to odl_l3 scenario files

    Change-Id: I43f1edcb8552876f2edcd1395cdd7b510bef646b
    Signed-off-by: Dan Radez <dradez@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index fdd855a..d350e73 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit fdd855aea7f7dddc63ce2571ec2389d1f3cadfdf
+Subproject commit d350e73e338e02513e75648c668fbadbae6dd535