test_client: Add H264 parameters for Firefox interop
test_client: Add H264 parameters for Firefox interop

Fixes #480

Closes #481.

ford-prefect/openwebrtc,adozenlines/openwebrtc,multipath-rtp/openwebrtc,adozenlines/openwebrtc,shoreflyer/openwebrtc,shoreflyer/openwebrtc,philn/openwebrtc,pererikb/openwebrtc,EricssonResearch/openwebrtc,adozenlines/openwebrtc,alessandrod/openwebrtc,danielwegener/openwebrtc,alessandrod/openwebrtc,philn/openwebrtc,stefhak/openwebrtc,shoreflyer/openwebrtc,shoreflyer/openwebrtc,multipath-rtp/openwebrtc,danielwegener/openwebrtc,stefhak/openwebrtc,ford-prefect/openwebrtc,pererikb/openwebrtc,adozenlines/openwebrtc,EricssonResearch/openwebrtc,danielwegener/openwebrtc,pererikb/openwebrtc,multipath-rtp/openwebrtc,shoreflyer/openwebrtc,ford-prefect/openwebrtc,multipath-rtp/openwebrtc,pererikb/openwebrtc,stefhak/openwebrtc,multipath-rtp/openwebrtc,danielwegener/openwebrtc,alessandrod/openwebrtc,EricssonResearch/openwebrtc,pererikb/openwebrtc,pererikb/openwebrtc,multipath-rtp/openwebrtc,philn/openwebrtc,EricssonResearch/openwebrtc,ford-prefect/openwebrtc,shoreflyer/openwebrtc,multipath-rtp/openwebrtc,danielwegener/openwebrtc,shoreflyer/openwebrtc,philn/openwebrtc,ford-prefect/openwebrtc,stefhak/openwebrtc,pererikb/openwebrtc,alessandrod/openwebrtc,alessandrod/openwebrtc,EricssonResearch/openwebrtc,alessandrod/openwebrtc,danielwegener/openwebrtc,philn/openwebrtc,stefhak/openwebrtc,EricssonResearch/openwebrtc,adozenlines/openwebrtc,adozenlines/openwebrtc,EricssonResearch/openwebrtc,philn/openwebrtc,stefhak/openwebrtc,philn/openwebrtc,ford-prefect/openwebrtc