Add support for e2e tests

[brunolm]

Create additional tests for these scenarios:

• Browser 1 retrieves two CID from storage miner f019243 (one <2MB and one >2MB)
• Browser 2 retrieves the smaller CID from Browser 1
• Browser 2 retrieves the larger CID from Browser 1
• Test:
  • Does the blue arrow download link for for both CIDs on browser 1
  • Does the blue arrow download link for for both CIDs on browser 2
  • Can the user delete both CIDs on browser 1
  • Can the user delete both CIDs on browser 2