Validation Report

This is now out-of-date: please see "Validation Report (revised)" below

Validation Report
  - Update IndexService to get missing field data from Solr
  - Model, controller, routes, and basic views for ValidationReport
  - Rake task to index sample invalid aggregation into Solr
What about creating your own helper module, like `Krikri::ValidationReports::UrlHelperBehavior`, which could get included here?