Add Integration Tests

[Jacobingalls]

We need a way to make sure than when we run ./run.sh ... that it is starting a web server and listening to requests.

We should perform integration testing on the api generally, db, and on-disk driver.

For example.

• Create a new volume

POST /VolumeDriver.Create 
{Name: "foo"}

ensuring that it gets a 200 {Err:""} back.

• Verify that the plugin knows about it

POST /VolumeDriver.List
{}

Ensuring that we get:

{ Volumes: [
    {Name: foo, ...}
]}

• Verify the db knows about it

echo "SELECT * FROM volumes;" | mysql -uroot -p<password> rdma

ensuring that our volume exits.

We will want to run tests like this for every feature. Think of them like unit tests, but for the actual APIs. For querying the API we can use cURL.