Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Created new class NovaException."
  - Created new class NovaException.

    Raising NovaException in nova_utils.py instead of Exception.

    Change-Id: I9564e43352114df18bccc794a5cd57e20880085f
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 0050ed7..2d08ff4 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 0050ed771d89f6a758a387a930feeb616dceecec
+Subproject commit 2d08ff42b777b5b0e0f7c82c32919834ae633382