It didn't have proper time to stabilize, making it sensitive to small changes. This CL increases the stabilization period from 20 to 30s. Also fixing some minor test suite bug found during investigation. Bug: webrtc:9718 Change-Id: If56dba5383251ad3d3efe304eebcd880522afabe Reviewed-on: https://webrtc-review.googlesource.com/c/119943 Reviewed-by: Christoffer Rodbro <crodbro@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26408}