Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Remove ocata puppet-ovn injection"
  - Remove ocata puppet-ovn injection

    This was needed in Danube, can be removed for Euphrates+

    JIRA: APEX-431

    Change-Id: Ic2101581c3ae9cbf80d5ed6b64be8e7b3bc9abf7
    Signed-off-by: Dan Radez <dradez@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 035c80d..d970df5 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 035c80d52a780125ba84d1bc5f8232c9ff2a4a17
+Subproject commit d970df54b78c5648a62711f9dbc42ec658baf05d