test admin page title
test admin page title

this is to acheive parity with the feature test in https://github.com/alphagov/digitalmarketplace-functional-tests/blob/d86d6bac41947c32ab4cb8c70afd3133c37f5f35/features/admin/company_details.feature#L22

alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend,alphagov/digitalmarketplace-admin-frontend