Adds longer timeout to lambda function and a delete for the lambda function
Adds longer timeout to lambda function and a delete for the lambda function

The default timeout was 3 seconds, which isn't enough time for our
tests.

The integration test should also fail if an error was encountered from
the lambda invoke.

[#115708761](https://www.pivotaltracker.com/story/show/115708761)

Signed-off-by: Edwin Xie <6bc24e9c160281972837d9e13287696d26612564@pivotal.io>

pivotal-golang/s3cli,pivotal-golang/s3cli,pivotal-golang/s3cli,pivotal-golang/s3cli