Note that the medium date format depends on locale, with en_NZ being
resolutely numeric. I’ve updated the test to verify a couple of locales
to make this more obvious.
Fixes#8121
* Test databases now include timestamp for easier debugging
* Use classname::class instead of string literal classnames
* Remove DataObject::get_one() from SapphireTest
* More fixes to ICU DB inconsitency for time formatting
* Correctly restore PHPUnits error handler
API Substitute Zend_Locale with Locale / NumberFormatter
API Substitute Zend_Date with IntlDateFormatter
API Added DBTIme::Nice12, FormatFromSettings
API Added Short() method to DBDate / DBTime / DBDatetime
API Add Date::getTimestamp()
API Added setSubmittedValue api for FormField
API Add second arg to base FormField::setValue()
API Major refactor of i18n into component data parts
API Implement Resettable interface to reset objects between tests
ENHANCEMENT Changed DBField::create_field return type to `static` to support better type hinting
ENHANCEMENT i18nTextCollector supports __CLASS__
