Hack up the innards of Puppet with mock extdata
Hack up the innards of Puppet with mock extdata

It seems that there is no nice way to mock the provision of extdata for the
test environment. This commit adds a MockExtdata module which provides a few
helper methods for managing extdata when running rspec tests.

Also sets the app_domain extdata value to a default of 'test.gov.uk'

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet