Update git submodules

* Update docs/submodules/snaps from branch 'stable/euphrates'
  - Sync setup.py with OpenStack Ocata

    The previous version differs from OpenStack Ocata and may raise
    runtime issues in Functest containers.

    Change-Id: I937b7a3d06f6cdf69ef66194b3f3cc632f6ff010
    Signed-off-by: Cédric Ollivier <cedric.ollivier@orange.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index d1a9242..59fd6c8 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit d1a92429bfe16eee251e045a578994dea8a779d2
+Subproject commit 59fd6c8062c03d081193ddbb71d84c8897c48ffc