Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Adds barbican service to deployment"
  - Adds barbican service to deployment

    This service is required for creating encrypted volumes for storage.

    JIRA: APEX-531

    Change-Id: Ied5ea1d6921ef96c1a352dba523d6f37245608e2
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 322f29c..1f6ee5a 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 322f29c64625fdaa42f76d226860bcbb85690d6c
+Subproject commit 1f6ee5a99cb191afde06695e449c53732453b222