Update git submodules

* Update docs/submodules/apex from branch 'stable/danube'
  - Merge "Adding --virtual-computes to deploy.sh help output" into stable/danube
  - Adding --virtual-computes to deploy.sh help output

    JIRA: APEX-426

    Change-Id: Id2ea69fd26c1160885cbd532d297ed9d3b89f5f7
    Signed-off-by: Dan Radez <dradez@redhat.com>
    (cherry picked from commit eb69165f0dcebf41cccfc3124f980bab53908a2d)

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 1a667b0..9b6f46e 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 1a667b0f76e3c281946d22a8a8b951498be23872
+Subproject commit 9b6f46e48cc123be0ea731b7a92d3c80f29a6d17