Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Merge "Refactored neutron_utils#get_router_by_name() to get_router()"
  - Refactored neutron_utils#get_router_by_name() to get_router()

    Added a router_settings (RouterSettings) object parameter
    in addition to router_name for more robust query options.

    JIRA: SNAPS-163

    Change-Id: I47672f531171d6ee0c90dabb6641640bf97c1d20
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 0428c2d..c52637e 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 0428c2d9e46f4ddd4a0458dbf8a48065eacabe66
+Subproject commit c52637e0f7e3a11b9ce39aa28ab16ffa57ce5e3c