Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "nosdn-fdio scenario fix"
  - nosdn-fdio scenario fix

    apex-puppet-tripleo: Ie336c22b366bd478963ca14e25d645fec0cded7a

    Change-Id: I0b9212023eea28ff15e1e2f020a8bbd37cb2bcff
    Signed-off-by: Feng Pan <fpan@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index e248a7b..38b3b13 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit e248a7becb2b72b6d66edd9e7d5ce5739fdba13d
+Subproject commit 38b3b1399f60412ef3afcab977707bb762972e17