FR - Add "--num-messages" option on PepperBoxLoadGenerator

[yiskaneto]

Hello,

This is a feature request to have the option to specify the number of messages to send on the PepperBoxLoadGenerator. For example: java -cp pepper-box-1.0.jar com.gslab.pepper.PepperBoxLoadGenerator --schema-file schema_file --producer-config-file producer.properties --throughput-per-producer 60000 --num-messages 6000000 --num-producers 1

In this case the "test-duration" option shouldn't be require as the goal is the number of messages and not the time.