Minor code cleanup.

Removed some unused code and modified the spacing (e.g. removed unnecessary white space, translated tabs into spaces, etc.).
Updated the way the Counts were being returned.

The counts for requests were being returned by each individual request rather than having a catch-all that updated the counts in the request handler. This has been fixed.
Added intro text.
Remove user account confirmation.
Avoid JSON encoding raw strings returned from requests.
Adding a working docker config for using the shims.
Convert two listeners to beans.
Load the default config file from the classpath instead of the file
system.
Change some bean configs to self-closing elements.
Convert shims from listeners to beans.
Change authentication token expiration to 1 week.
Make the OmhObjectMapper constructor public so it can be used anywhere.
Refactor the actual data reading out of the DataReadRequest.
Add a getUsers method to fetch all database users.
Adding a method to check if a user can access certain data.
Adding a Registry.createSchema method.
Adding a basic DPU implementation to call remote DPUs.
Tweak the DPU server URLs to match the DSU URLs and add some getters.
Added a manual DPU runner.
Adding a scheduled DPU runner to run the DPUs nightly.