Update git submodules

* Update docs/submodules/aaf/certservice.git from branch 'master'
  to 639c40968f329fc6526a35c9fca2817e9cf0faa7
  - Merge "Load CMP Servers config from volume"
  - Load CMP Servers config from volume

    Create Kubernetes secret to store Cmp Server config file and mount it to container as volume

    Issue-ID: AAF-997
    Signed-off-by: Adam Wudzinski <adam.wudzinski@nokia.com>
    Change-Id: I163b720ce14729328af34dd61e6eb0108c76d58b

diff --git a/docs/submodules/aaf/certservice.git b/docs/submodules/aaf/certservice.git
index ff8b471..639c409 160000 (submodule)
--- a/docs/submodules/aaf/certservice.git
+++ b/docs/submodules/aaf/certservice.git
@@ -1 +1 @@
-Subproject commit ff8b47138f19faf4ca62f1f3d0773565c8df6188
+Subproject commit 639c40968f329fc6526a35c9fca2817e9cf0faa7