Rename perfplat.dev to full dev domain

Maintaining 2 domain names in development is a pain, so we're just
going to use the full one.
Increase server_names_hash_bucket_size everywhere

Now that we have super long domain names in development, we're running
into an error with Nginx starting:

    2014/05/02 15:30:38 [emerg] 13185#0: could not build the server_names_hash, you should increase server_names_hash_bucket_size: 64

@robyoung and I can't imagine that this will cause any massive impact
on the machines that don't currently receive it (backend boxes etc),
so increase it across the board.
Merge pull request #384 from alphagov/perfplat-dev-development-domain

Rename perfplat.dev to full dev domain
Add jenkins as host alias to jumpbox-1

So that scripts (ie sensu alerts) can access Jenkins to eg download
build artifacts.

Related to https://www.pivotaltracker.com/story/show/67409248

[#67409248]
Merge pull request #385 from alphagov/add-jenkins-to-hosts

Add jenkins as host alias to jumpbox-1
Sensu check script for pp-smokey output

This script is run with a pp-smokey test name, ie `backdrop_read`. It
downloads the latest pp-smokey results from Jenkins and parses the
output. It returns an exit code which a Sensu check can interpret.
Add sensu::checks for each pp-smokey feature

These run on the monitoring box invoke the smoke test checker script
every minute.

https://www.pivotaltracker.com/story/show/67409248

[Delivers #67409248]