core.kmd.json: Rewrite all bandwidth docs
core.kmd.json: Rewrite all bandwidth docs

Changes:
- MinVideoRecvBandwidth
- MaxAudioRecvBandwidth
- MaxVideoRecvBandwidth
- MinVideoSendBandwidth
- MaxVideoSendBandwidth
- RembParams.rembOnConnect

Kurento/kms-core,Kurento/kms-core,Kurento/kms-core,Kurento/kms-core