Update unit tests to reference logo.png instead of trophy.png.

Review Request #8322 — Created Aug. 12, 2016 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
15638a3...

Reviewers

Many of our unit tests that deal with file attachments are referencing
trophy.png as a sample file. An upcoming change will be removing this
file, which will break the tests. This change swaps out those references
to use logo.png instead, in order to keep tests from failing.

Unit tests pass.