ENGCOM-4492: graphQl-427: adjusted code coverage of the set shipping address feature #448

 - Merge Pull Request magento/graphql-ce#448 from magento/graphql-ce:GraphQl-427-adjust-test-coverage-of-the-shipping-methods
 - Merged commits:
   1. e1d5544
   2. 32366e0
   3. 5f3d076
   4. adf0e09
   5. 4748c2d

Author: magento-engcom-team