Update git submodules

* Update docs/submodules/edgecloud from branch 'master'
  - Clarification to the scope of the document

    This change clarifies the scope of the document. As edge clouds
    "on the other side of radio" are not discussed in the document at
    all they should be removed from the scope explicitly.

    Change-Id: Ie35566f6ffed9b83dbe859046886bd1004e28ca2
    Signed-off-by: Gergely Csatari <gergely.csatari@nokia.com>

diff --git a/docs/submodules/edgecloud b/docs/submodules/edgecloud
index 6c5b926..a7c184a 160000 (submodule)
--- a/docs/submodules/edgecloud
+++ b/docs/submodules/edgecloud
@@ -1 +1 @@
-Subproject commit 6c5b92602fb5dc549941e66557f1369093d459b4
+Subproject commit a7c184a7f5fedcc39a077e8c37da7e8fa22272be