Yet another TestStreamedMediaChanCall race fix...
Yet another TestStreamedMediaChanCall race fix...

This is a previously identified one actually but the fix wasn't sufficient in all cases. The new one
should be.

special/telepathy-qt-upstream,freedesktop-unofficial-mirror/telepathy__telepathy-qt,TelepathyQt/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,detrout/telepathy-qt,TelepathyQt/telepathy-qt,special/telepathy-qt-upstream,tiagosh/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,tiagosh/telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,TelepathyQt/telepathy-qt,tiagosh/telepathy-qt,anantkamath/telepathy-qt,tiagosh/telepathy-qt,TelepathyIM/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,freedesktop-unofficial-mirror/telepathy__telepathy-qt4,special/telepathy-qt-upstream,TelepathyQt/telepathy-qt,detrout/telepathy-qt,freedesktop-unofficial-mirror/telepathy__telepathy-qt,TelepathyIM/telepathy-qt,anantkamath/telepathy-qt,anantkamath/telepathy-qt,TelepathyIM/telepathy-qt,detrout/telepathy-qt