add initial infrastructure for integration testing
add initial infrastructure for integration testing

Signed-off-by: Jess Frazelle <e0d1a862d8f31af605ecef8c92857b8938ba622e@google.com>

golang/dep,golang/dep,EwanValentine/dep,EwanValentine/dep,ibrasho-forks/dep,golang/dep,ibrasho-forks/dep