Player tests

[bent0b0x]

This PR had to be reverted again; whenever we merge it onto dev, for some reason we are getting this timeout on circleCI:

  🦄 Uploader Tool
    ✓ should have basic flow in place (12507ms)
    - cancel upload should work [but is not yet]

  Video Store:
    - should be possible to buy (and unlock) a video  
    - should show an error if the password is wrong
    - should show the signin form if the user is not logged in
    - should show an error if the user does not have enough PTI 
    - should show an error if the user does not have enough ETH
    - test individual steps

  Wallet:
Mocha failed
error An unexpected error occurred: "Command failed.
Exit code: 2
Command: sh
Arguments: -c yarn run chimp:setup & chimp .circleci/chimp.circleci.config.js && yarn run chimp:teardown
Directory: /root/repo
Output:
".
info If you think this is a bug, please open a bug report with the information provided in "/root/repo/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error An unexpected error occurred: "Command failed.
Exit signal: SIGHUP
Command: sh
Arguments: -c cd ./mock-server && node index.js
Directory: /root/repo
Output:
".
info If you think this is a bug, please open a bug report with the information provided in "/root/repo/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
Exited with code 1

I opened up a forum post with circleCI but I'm not expecting much traction

Reverts Paratii-Video/paratii-portal#627