[Bug] Test directory referenced by the Testing documentation not found

[mattgoespro]

Current Behavior

The Testing documentation summary (docs/testing.md) contains a hyperlink to the example tests directory which does not exist.
Reference: For more test references, check out the [project's tests (https://github.com/vitusortner/floor/tree/develop/floor/test/integration).

Expected Behavior

Reference: For more test references, check out the [project's tests (https://github.com/vitusortner/floor/tree/develop/floor_common/test/integration).