Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Increases mininum virtual controller RAM

    nosdn virtual deployments are hitting OOM on controllers.  This patch
    bumps controller minimum ram from 8 to 10 for nosdn, and 10 to 12 for
    ODL.  Also, the maximum workers for gnocchi are limited to 1 for virtual
    deployments.

    JIRA: APEX-496

    Change-Id: I50d38c60a682f00c14489c65ee8ee6305bc3dc62
    Signed-off-by: Tim Rozet <trozet@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 0890153..64e0555 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 0890153eb47fd29abf6ec419096546103aa22616
+Subproject commit 64e055560e1f3ed47805d921541d884ea79624cf