Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Added test to ensure a port to the external network can be added to
    a router by an 'admin' user.

    JIRA: SNAPS-283

    Change-Id: I78a48862de5bd48dca7dc38d197c0df315003638
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index e8a50c9..9d5a173 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit e8a50c9979471856bab56d83a8d67ce47b552990
+Subproject commit 9d5a173d158af529169f948b06dd80cd62a99d3e