Update git submodules

* Update docs/submodules/edgecloud from branch 'master'
  - Allowing resource optimized OpenStack

    One option for the deployment of edge cloud infrastructures
    is to use different instances of the same resource optimized
    OpenStack in both the large, medium and small edge sites.

    This change adds this as an alternative to the usage of
    different OpenStack deployment variants in the different
    sites.

    Change-Id: Icdcdb7fb8b0cb43f36b2f53ef74278475aa9817e
    Signed-off-by: Gergely Csatari <gergely.csatari@nokia.com>

diff --git a/docs/submodules/edgecloud b/docs/submodules/edgecloud
index 63c1d0f..3708deb 160000 (submodule)
--- a/docs/submodules/edgecloud
+++ b/docs/submodules/edgecloud
@@ -1 +1 @@
-Subproject commit 63c1d0f1b1dfc5b64f9b50f20a55e7dcc5d8ca5b
+Subproject commit 3708debe3f7ff9edd0f0a52998ebf7a799bb712f