Update git submodules

* Update docs/submodules/vid.git from branch 'master'
  to 15fd2ac8d6aef0f5bdefef6f5b18d15c710ee970
  - fix identification of port mirroring service
    
    Issue-ID: VID-701
    Signed-off-by: Eylon Malin <eylon.malin@intl.att.com>
    Change-Id: I56e4c9502724f271810b44ea946cd56f4013c543
    
diff --git a/docs/submodules/vid.git b/docs/submodules/vid.git
index e172eb3..15fd2ac 160000
--- a/docs/submodules/vid.git
+++ b/docs/submodules/vid.git
@@ -1 +1 @@
-Subproject commit e172eb389d56dced4fa649a43d73516827c2c153
+Subproject commit 15fd2ac8d6aef0f5bdefef6f5b18d15c710ee970