i18n View Helper Tests Depend on intl version fix

The tests borked due to an intl upgrade:
Internationalization support => enabled
version => 1.1.0
ICU version => 49.1.2
ICU Data version => 49.1.2

This changes the tests for the date formatter to now check the output against the IntlDateFormatter directly. This also allowed for several of the tests to be uncommented.  Previously there was a static date that was being tested against.