Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Allow all in one deployments

    This patch adds the ability to deploy all in one single nodes (Control
    + Compute). To enable this functionality do the following for each
    deployment type:
     - Baremetal: do not tag any nodes as compute in the inventory file
     - Virtual: use argument '--virtual-computes 0'

    JIRA: APEX-548

    Change-Id: I22525c9eb21d331129c819449316c26a6fcf522d
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 7bbbc90..c5959cc 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 7bbbc905908be356fd1cf2f869b43d7e4d87c12b
+Subproject commit c5959cc14b95e9d10b78ebf3c8e2525c672fc0c7