Update git submodules

* Update docs/submodules/apex from branch 'stable/danube'
  - Merge "Fixes bugs in ovs dpdk" into stable/danube
  - Fixes bugs in ovs dpdk

    Changes Include:
     - Fixes an issue where using non-1st nic admin network deployment would
       result in loss of network connectivity during deployment.
     - Fixes an issue where not specifying cores to pin to in performance
       options would result in an incorrect '0' value used for core mask.

    JIRA: APEX-452
    JIRA: APEX-453

    Change-Id: I413290161abd9b2fa39b659d5ff989da9554f603
    Signed-off-by: Tim Rozet <trozet@redhat.com>
    (cherry picked from commit c9bde98a9729dbc442ce8c0cdbc29c7d35167db6)

diff --git a/docs/submodules/apex b/docs/submodules/apex
index d94215f..d7cd79b 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit d94215f00bafd38466e3eaa7d2724bb8c42e0fe3
+Subproject commit d7cd79b099f71d5f1d46498222d9bb0c7cbdcc6a