Remove use of 'shallow' (react-unit-test-utils) in following files:

• src/containers/CourseCard/components/CourseCardActions/SelectSessionButton.test.jsx
• src/containers/CourseCard/components/CourseCardActions/ViewCourseButton.test.jsx
• src/containers/CourseCard/components/CourseCardBanners/CreditBanner/views/components/CreditRequestForm/index.test.jsx
• src/containers/CourseCard/components/CourseCardBanners/CreditBanner/views/components/CreditContent.test.jsx
• src/containers/CourseCard/components/CourseCardBanners/CreditBanner/views/components/ProviderLink.test.jsx
• src/containers/CourseCard/components/CourseCardBanners/CreditBanner/views/ApprovedContent.test.jsx