Update git submodules

* Update docs/submodules/apex from branch 'master'
  - Merge "Fix dependencies errors in iso verify"
  - Fix dependencies errors in iso verify

    Change-Id: I6f169d6d89a0468c6c9208ba448c4da0a6f776ee
    Signed-off-by: Feng Pan <fpan@redhat.com>

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 9c79fb8..dcd47c9 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 9c79fb8cfef2a018252229f347d541815e976a15
+Subproject commit dcd47c9bfd51cd8b84fecbe44b49d589ac821adc