splitting highpoint into north and south
changing Moorland Hatfield Open to Hatfield Open as requested by the prison.
renaming IOW prisons to show they are from the isle of wight - please do not merge until I check with TD
This handles renaming changes for the prisons in previous commits.
Merge pull request #44 from ministryofjustice/safe-renames-78206202

Rename some prisons
fixing isle of wight's visiting times and numbers
Merge pull request #45 from ministryofjustice/fix_iow_times

fixing isle of wight's visiting times and numbers
Fix specs for recent content & data changes
Simplify unbookable spec
Merge pull request #46 from ministryofjustice/fix_specs

Fix specs for recent content & data changes
Use VisitHelper instead of referring to globals in views.
Merge pull request #48 from ministryofjustice/no-globals

Use VisitHelper instead of referring to globals in views.
Added the pg gem.

[#78038926]
Added active_record configuration.

[#78038926]
Added a model to represent metrics for a single visit.

[#78038926]
Added the database_cleaner gem.

[#78038926]
MetricsLogger now uses VisitMetricsEntry.

[#78038926]
Added a migrator.

[#78038926]
Removed no longer used pieces, changed templates, adjusted CalculatedMetrics.
Removed references to redis from the app, as we're no longer using it for caching.

[Finishes #78038926]
Attempt to fix a bug in logstasher.