Consider loosening tests to not fail on presence of additional keys in API response

[tannerbaum]

Right now if Clockodo adds a new property to their response, some of our tests that are expecting properties to match one-to-one would fail. We should consider removing this check altogether, or allow for additional properties to be present.

[tannerbaum]

[jhnns]

Yep, that's not good. The test is testing too much :)