Update git submodules

* Update docs/submodules/apex from branch 'stable/fraser'
  - Adding git as required dependency for Apex RPMs

      If it's not installed, opnfv-deploy will output an
      error message.

    JIRA: APEX-599

    Change-Id: Ib826204120f53abce1f4f1e3e4ec3119a71ab650
    Signed-off-by: Ricardo Noriega <rnoriega@redhat.com>
    (cherry picked from commit 52557753e9cd240bc69d6b5d037a5b84e310050c)

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 2a53c61..5ff0987 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 2a53c61bb68ce13fc51c9f58a712a8f41b34a2b0
+Subproject commit 5ff098787664eb141c3c169bdc194c188520ef89