I believe metadata-agent.ini is incorrect sample bellow (Kilo on Ubuntu 14.04 via devstack)

root@ubuntu-System:/etc/neutron# cat metadata_agent.ini | grep -v ^$ | grep -v ^#
[DEFAULT]
signing_dir = /var/cache/neutron
cafile = /opt/stack/data/ca-bundle.pem
auth_uri = http://192.168.1.51:5000
project_domain_id = default
project_name = service
user_domain_id = default
password = secret
username = neutron
auth_plugin = password
root_helper = sudo /usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf
nova_metadata_ip = 192.168.1.51
debug = True
verbose = True
auth_url = http://192.168.1.51:35357
auth_region = RegionOne
admin_tenant_name = %SERVICE_TENANT_NAME%
admin_user = %SERVICE_USER%
admin_password = %SERVICE_PASSWORD%
[agent]
root_helper_daemon = sudo /usr/local/bin/neutron-rootwrap-daemon /etc/neutron/rootwrap.conf