Update git submodules

* Update docs/submodules/apex from branch 'stable/danube'
  - Merge "Fix dependencies errors in iso verify" into stable/danube
  - 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 742be8f..36e9307 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 742be8f455b9526fd32fc903aedc2608c90ead93
+Subproject commit 36e93077409a1ac320a971fb4db5e95e3c5c0353