Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Removed the use-keystone option for running tests.

    As these tests have evolved, the -k option is no longer necessary and
    actually cause some tests to fail now and I have only been testing with
    that option always being set.

    Change-Id: Ib866cc4f3df1c790619c64508ac9733a2b6d4102
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index d869e27..d75a136 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit d869e27230bf390c8f4fe68f5682584d4b9dbc49
+Subproject commit d75a13621de68b122189301a761b3802f9b86ef1