Update git submodules

* Update docs/submodules/apex from branch 'stable/euphrates'
  - Merge "Adding python unittests for apex/virtual/*" into stable/euphrates
  - Adding python unittests for apex/virtual/*

    Change-Id: I13dd395cd6270cbf0a02855b1d29794ecca06d76
    Signed-off-by: Dan Radez <dradez@redhat.com>
    (cherry picked from commit 9d24ddc56a76175a4b7514cea5c789e2612b2528)

diff --git a/docs/submodules/apex b/docs/submodules/apex
index 924fd4c..ba982af 160000 (submodule)
--- a/docs/submodules/apex
+++ b/docs/submodules/apex
@@ -1 +1 @@
-Subproject commit 924fd4c07a19029188b315f5aca716b03665f79f
+Subproject commit ba982af00b7ae7901eeef44260f62867dc60efc1