Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Adds Calipso scenario"
  - Adds Calipso scenario

    Change-Id: Icc8a23e49c9ccc011481f6b97599d4f75873ebb1
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 8a8cb8e..e6a9d7c 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 8a8cb8e901db314fa59ed5275040b9e49b36663c
+Subproject commit e6a9d7cebc9f6083a72863102138ab76a75ae3c9