Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Cluster template cleanup

    Removal of negative tests where an invalid keypair is being
    configured. This test was not operating consistently between
    pods

    Update testing documentation

    Updated some invalid class names in pydoc

    Change-Id: I7a392e9ed993450de40a20457044ba8294d45044
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 530ca56..43151f4 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 530ca566f0554d69ac11dd3b919be25c2e689ed6
+Subproject commit 43151f4e44e64b8436bed234f2dcb60dfc643687