Adding caching to proxied requests

Cache duration defaults to 2 seconds and can be overriden in the config yml file.

Now that we cache all requests to a specific health check it made the test config very boring as all of the  environments registered the same health check. 

So I added a property to enable test mode called... "testMode", which creates lots of random health checks on different URLs and now the test config envs all point to different healthchecks.  

Added Java 7 as the compile version as I used multicatch.

Repackaged healthchecks and added new test for new ProxyService. 

Did some annoying formatting.