Improves notes unit tests by replacing checking with first comment's body with checking with default / user-specified descriptions. Also, removes test_author unit test, adds setting note's author when checking notification's success and sets first comment type to "opened" in tests with tooltips which require first comment to be "opened".
This avoids passing around the reported_user via forms. There was no
validation anywhere that the reported_user corresponded to the object
being reported. This approach removes those worries too.
