Add .travis.yml

This patch adds the configuration file for the TravisCI. It just checks
if the style of the code is appropriately organized.

Change-Id: Ib1b394077b48794e02b179b765c27fe15aac6043
Signed-off-by: Taku Fukushima <tfukushima@midokura.com>
Fix typos in dr_agent.py

This patch fixes a typo in neutron/agent/dr_agent.py.

Change-Id: I811a0489888ca6cebc1c5eee21f5b5cd8d681f3b
Signed-off-by: Taku Fukushima <tfukushima@midokura.com>