[MFTF] User views stock license status in Media Gallery grid

[filmaj]

Description

Implement MFTF test to cover scenario: "User views stock license status in Media Gallery grid" (story 40, #430)

Preconditions

1. Admin User is logged into Admin Panel
2. Adobe Stock Preview image exists in Media Gallery
3. User is signed into Adobe IMS

Test steps

2. Open Media Gallery
3. Verify that preview images in Media Gallery have preview label