kmsagnosticbin: improve default enc bitrate setting
kmsagnosticbin: improve default enc bitrate setting

Change-Id: I6734499899e06a395bf452d132e9a9049ef77944

Kurento/kms-core,Kurento/kms-core,TribeMedia/kms-core,ESTOS/kms-core,shelsonjava/kms-core,shelsonjava/kms-core,ESTOS/kms-core,TribeMedia/kms-core,TribeMedia/kms-core,ESTOS/kms-core,Kurento/kms-core,TribeMedia/kms-core,ESTOS/kms-core,shelsonjava/kms-core,shelsonjava/kms-core,Kurento/kms-core