Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Remove pacmeaker workaround"
  - Remove pacmeaker workaround

    There was a compatibility issue with the centos 7.4/7.5 between the host
    pacemaker version and container.  Now that containers have moved to 7.5
    we should not need this workaround anymore.

    Change-Id: I9632c65e87687d4f36130719c6df9af2e913eed8
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 742f9d1..23fc66e 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 742f9d16ab751c2d0398c2d332374cffcf6822ff
+Subproject commit 23fc66e5bce6fe634d6e99cfa89d0424a47e66a1