Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Increase ssh timeout and add retry for Ansible

    Several users have experienced random disconnections from the undercloud
    during deployment.  This should help to stop deployments from aborting.

    Change-Id: Idb7619d493b329944f21ea6641f6826a8fcc3907
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 75afddf..0fc3c21 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 75afddf0e4032e4af389c5d85b529704102a77a2
+Subproject commit 0fc3c2190ad304052d0ec210c94ab3f09e95b71d