Refactored some hard to change test data.
Merge pull request #276 from 4teamwork/lg-refactor-hard-to-change-test-data

Refactor some hard to change test data.
Added limited-public option for public trial.
Enforce correct order in inbox-task-tab tests.
Merge pull request #274 from 4teamwork/lk_public_trial_additional_value

Added limited-public option for public trial.
Document: Refactor behaviors to be a package with separate modules.
Cleanup: Docstrings, spelling.
Add assertion to existing test that didn't have one.
Extract document metadata into separate behavior.
Re-add previously removed FileOrPaperValidator.