Fix neutron func job sudo config.

The neutron functional job appears to require explicit config
to avoid using a tty in invoking sudo.

Change-Id: I3de8fd8039258625e03d0fc78e907c8462431a42

modules/openstack_project/files/jenkins_job_builder/config/neutron-functional.yaml

@@ -29,6 +29,7 @@
               cd $BASE/new/neutron
               # Run tests as the stack user to allow sudo.
               sudo chown -R stack:stack $BASE/new/neutron
+              echo 'Defaults:stack !requiretty' | sudo tee /etc/sudoers.d/00_no_tty
               echo "Running neutron functional test suite"
               sudo -H -u stack tox -e functional
           }}