Add cluster performance testing scripts. - Wait SSH instead of sleep in the AWS installation script; - Remove Java code and generate config files in Ansible; - TPC-H is one benchmark, and more benchmarks could be added into the framework.
Change "samples" to "opt" in the distribution package. This change also does the following things: - make AWS script more robust: (1) can be run from anywhere, (2) eliminate the need of customize_deployment.yml. - cleanup documentation to reflect the directory structure change. - fix Managix zip to be able to directories deeper than 2 levels.