Change use of Contact in ajax_test test module

Problem/Motivation

Contact module is being deprecated. Usages is tests not in Contact needs to removed and test coverage moved to the Contact module.

ajax_test has a dependency on the contact module.

Steps to reproduce

Proposed resolution

Remaining tasks

Investigate how contact is used by tests using 'ajax_test'.

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet