Test failures due to dependencies between scenario tags

[pfrenssen]

The PR #101 is failing because there are dependencies between the @cleanup:media and @remote-video tags in the Behat scenarios.

The @cleanup:media tag relies on the fact that the Media module is enabled, which happens in the @remote-video tag. Behat does not allow to set a priority on hooks (which is by design, ref Behat/Behat#438), so it is entirely possible that the @cleanup:media tag runs first, and in this case we get this error:

    BeforeScenario # Drupal\Tests\oe_webtools\Behat\WebtoolsCleanupContext::collectExistingEntities()
      The "media" entity type does not exist. (Drupal\Component\Plugin\Exception\PluginNotFoundException)

The best way to solve this would be to get rid of the @cleanup:x tags completely, it is not a good idea to rely on magically cleaning up any entities present in the system since it might hide underlying bugs in the implementation and causes data loss if a developer is pausing the test and interacting with the site. In all scenarios only the exact entities that were created should be cleaned up, no more, no less.