Issue 36: Prepare for release 0.1

[RaulGracia]

Change log description
Updated Pravega artifact versions to 0.8.0.

Purpose of the change
Fixes #36.

What the code does
Updates Pravega artifact versions to 0.8.0 for Pravega driver.

How to verify it
mvn clean install -DskipTests -Dlicense.skip should pass.

Deployed and it works on AWS:

7:50:04.991 [main] INFO io.openmessaging.benchmark.worker.DistributedWorkersEnsemble - Workers list - producers: [http://10.0.0.23:8080]
17:50:04.991 [main] INFO io.openmessaging.benchmark.worker.DistributedWorkersEnsemble - Workers list - consumers: [http://10.0.0.90:8080]
17:50:04.993 [main] INFO io.openmessaging.benchmark.Benchmark - --------------- WORKLOAD : 1 producer / 1 consumers on 1 topic --- DRIVER : Pravega---------------
17:50:11.047 [main] INFO io.openmessaging.benchmark.WorkloadGenerator - Created 1 topics in 504.30452 ms
17:50:11.800 [main] INFO io.openmessaging.benchmark.WorkloadGenerator - Created 1 consumers in 748.872367 ms
17:50:11.866 [main] INFO io.openmessaging.benchmark.WorkloadGenerator - Created 1 producers in 65.297628 ms
17:50:11.866 [main] INFO io.openmessaging.benchmark.WorkloadGenerator - Waiting for consumers to be ready
17:50:12.022 [main] INFO io.openmessaging.benchmark.WorkloadGenerator - All consumers are ready
17:50:12.023 [main] INFO io.openmessaging.benchmark.WorkloadGenerator - ----- Starting warm-up traffic ------
17:50:22.188 [main] INFO io.openmessaging.benchmark.WorkloadGenerator - Pub rate 54240.6 msg/s / 55.5 MB/s | Cons rate 54240.7 msg/s / 55.5 MB/s | Backlog: 0 msg | Pub Latency (ms) avg: 17.1 - 50%: 11.8 - 99%: 114.8 - 99.9%: 152.6 - Max: 168.8

Signed-off-by: Raúl Gracia [email protected]