Update git submodules

* Update docs/submodules/snaps from branch 'stable/fraser'
  - Fixed bug when use_keystone parameter is False.

    When false, the self.keystone member is None and now it is being
    used in many more places with some of the other changes during
    the Fraser release

    JIRA: SNAPS-299

    Change-Id: I752afb127287036a16f3c9b00e6feae9cab80143
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>
    (cherry picked from commit f9003b2925fd340998fd38fd353fba187aeadc69)

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 390d31e..e608a91 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 390d31e3a6eaa0968474d19d71ec804d0c6c071a
+Subproject commit e608a9113f5df4da58c411e4e30c9ea25903ae4a