Disable flaky video capture test.
Disable flaky video capture test.

BUG=2405
TBR=fischman@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2265005

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 9c74be7bd108b428ddb5466417cfa9764e1e8053

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc