Update git submodules

* Update docs/submodules/daisy from branch 'stable/euphrates'
  - Merge "Update artifacts url" into stable/euphrates
  - Update artifacts url

    Use artifacts.opnfv.org intead of other urls

    Change-Id: I9a04d89cfbb8ee3c1296cff4a60180ae3248f1f2
    Signed-off-by: Julien <zhang.jun3g@zte.com.cn>
    (cherry picked from commit 6a0f0d01557c896d6deeafb8aec125458fbe6115)

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index e422c79..b09f1e9 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit e422c79b1e7071f80711ada90fd9f800c0e0001d
+Subproject commit b09f1e970d7a9dfb68216975c2705bab3d84eac8