Revert "Disable the test: DtmfTest.ManualSuccessfullySendsIn/OutOfBandTelephoneEvents"

This reverts commit r5479.

R=henrika@webrtc.org
BUG=2880

Review URL: https://webrtc-codereview.appspot.com/7989004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5485 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed