Update git submodules

* Update docs/submodules/joid from branch 'stable/euphrates'
  - Need to use version 17.08 OpenStack charms for OpenContrail with Ocata

    Change-Id: I100d0d6108b9ea094e7daf2583ca64cb79e5c2f6
    Signed-off-by: Stuart Mackie <wsmackie@juniper.net>
    (cherry picked from commit be6c0dd8dc6f7eb57460d3f6351e78641d5a7501)

diff --git a/docs/submodules/joid b/docs/submodules/joid
index 61c0f2d..08f08fd 160000 (submodule)
--- a/docs/submodules/joid
+++ b/docs/submodules/joid
@@ -1 +1 @@
-Subproject commit 61c0f2deba133c0a180e4d9462927c86973c8390
+Subproject commit 08f08fdeb63bec1b5d0ad2042741537318a5fd1d