Disable RampUpTest.UpDownUpThreeStreams.
Disable RampUpTest.UpDownUpThreeStreams.

NOTRY=True
NOPRESUBMIT=True
TBR=stefan@webrtc.org

BUG=webrtc:6248

Review-Url: https://codereview.webrtc.org/2273683002
Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#13863}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 649a21a25fd05fab81d3c2e9587e4291c05028e9

Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk,Alkalyne/webrtctrunk