Update git submodules

* Update ovn-octavia-provider from branch 'master'
  to 8fd9860fce0f72ad93098a04fe6a9f66c7b27296
  - Merge "Drop workaround for Python < 2.7.4"
  - Drop workaround for Python < 2.7.4

    Also setup.py is no longer managed by the global tool.

    Change-Id: I00acafab29506fbb86cdf9a995173a1f4a390efe
    Signed-off-by: Takashi Kajinami <kajinamit@oss.nttdata.com>

diff --git a/ovn-octavia-provider b/ovn-octavia-provider
index c194431e8e6ebb218c1923dbcdb26ff3acf8ef84..8fd9860fce0f72ad93098a04fe6a9f66c7b27296 160000 (submodule)
--- a/ovn-octavia-provider
+++ b/ovn-octavia-provider
@@ -1 +1 @@
-Subproject commit c194431e8e6ebb218c1923dbcdb26ff3acf8ef84
+Subproject commit 8fd9860fce0f72ad93098a04fe6a9f66c7b27296