[maven-release-plugin] prepare release 0.8.9
[maven-release-plugin] prepare release 0.8.9

DavidHerzogTU-Berlin/astyanax,DavidHerzogTU-Berlin/astyanax,bazaarvoice/astyanax,apigee/astyanax,fengshao0907/astyanax,Netflix/astyanax,gorcz/astyanax,DavidHerzogTU-Berlin/astyanax,maxtomassi/ds-astyanax,hector-client-org/hector-exp,gorcz/astyanax,fengshao0907/astyanax,Netflix/astyanax,Netflix/astyanax,maxtomassi/ds-astyanax,bazaarvoice/astyanax,apigee/astyanax