Add safe navigation in CorporateInformationPage#title
Add safe navigation in CorporateInformationPage#title

Interaction between Globalize and the corporate_information_page_type
relation causes this to fail because the relation may still be nil when
it is read, at least during tests.

alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall