update maxbitrate to control bitrate vary range
fix idr_id: idr_id should be adding regardless of the sps strategy
Merge pull request #1608 from ruil2/bits_update

    update maxbitrate to control bitrate vary range
add this log for codec
encoder log level adjustment in UT to avoid too many output and some formatting
Merge pull request #1613 from sijchen/fix_ut2

[UT] encoder log level adjustment
Merge pull request #1614 from sijchen/fix_idr_id1

[Encoder] fix idr_id: idr_id should be adding regardless of the sps strategy
Merge pull request #1612 from huili2/log_add_this_codec

add this log for codec
Merge remote-tracking branch 'upstream/master' into travis.osx