Improve Narayana and other products' configuration in the performance repository

We want Narayana to be able to perform at its best during the performance tests and adapt the Narayana configuration to the environment where the performance is tested.

Improve Narayana and other products configuration in the performance repository.

Narayana "HornetqJournalEnvironmentBean.bufferFlushesPerSecond" property should be increased.

Atomikos "com.atomikos.icatch.max_actives" property should not limit the number of active transactions during the performance tests.