Add middleware to log incoming request URIs at DEBUG level

This commit adds a simple middleware function that will log all
incoming HTTP request URIs at DEBUG level.  This allows you to
add a line to your log4j.properties that will give you visibility
into all of the requests that are coming in.
Move debug logging wrapper to bottom of wrappers list
Merge pull request #467 from cprice-puppet/feature/master/debug-log-http-requests

Add middleware to log incoming request URIs at DEBUG level