Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - bugfix: get_security_group_by_id always return first element

    add check on id before return value
    fixed kwarg into the neutron.list_security_groups to the correct one 'id'
    added unit test to ensure this function always works as designed

    JIRA: SNAPS-82

    Change-Id: I965e1dd54fd1efa8c2d7f6efb87c78ab24cca0e5
    Signed-off-by: Morgan Richomme <morgan.richomme@orange.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 10c665d..956acc7 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 10c665d7c831cf198ac9e675654693860e602bf9
+Subproject commit 956acc7da293b931c3e21e64fa0a9011f995c11c