Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Change exception message.

    Change-Id: I120faaa8695db5f83e39b521aaa6c1ab68e7fcc1
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 1634f6e..e2cbd24 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 1634f6ed27e33c52334d97c1c85f96eb6e651426
+Subproject commit e2cbd241617b3eeaa62ab9f47ed4dff75f68b101