This causes detailed node lookups for the grouped-by-process-name view to fail. Also, add a test for process walker trimmming whitespace, and a test the process-by-name view gives the right result.
- Move render.Rpt to test.Report
- Remove report/report_fixture_test.go; it was unused
- Remove report fixture in app/ and make tests use test.Report
- Move expected outputs into render/expected, so they can be reused
This makes container image details show the containers (and processes) correctly.
Also:
- introduces a 'test' package, moved Diff function there.
- adds some tests for this new rendered view.
