Update git submodules

* Update neutron from branch 'master'
  to 3d7dbd27c6569ea03d3bc515847116a655fdc559
  - Merge "Change some common test code to use project_id"
  - Change some common test code to use project_id

    Change common code shared between the unit and
    functional tests to use new self._project_id.

    Blueprint: https://blueprints.launchpad.net/neutron/+spec/keystone-v3

    Change-Id: If6bcbfa9c96ee6864502d6aa9761a9b8f92ff90d
    Signed-off-by: Brian Haley <haleyb.dev@gmail.com>

diff --git a/neutron b/neutron
index e288617ba6abdb40f3707f1aa44f64383989fbdc..3d7dbd27c6569ea03d3bc515847116a655fdc559 160000 (submodule)
--- a/neutron
+++ b/neutron
@@ -1 +1 @@
-Subproject commit e288617ba6abdb40f3707f1aa44f64383989fbdc
+Subproject commit 3d7dbd27c6569ea03d3bc515847116a655fdc559