PRD-4483 - Add error handling for external tool launch failure
Merge pull request #122 from pentaho-skarmali/PRD-4556_performance_measurements

PRD-4556: Cleaned up performance test cases
Merge pull request #120 from pentaho-tband/PRD-4483

PRD-4483 - Add error handling for external tool launch failure
PRD-4586 - Removed 'Add' from menu-items
Merge pull request #123 from pentaho-skarmali/PRD-4586_remove_add_from_menu_item

PRD-4586 - Removed 'Add' from menu-items
PRD-4556:  Added a rampUp option so that performance measurements are more smoother from run to run and more accurate as the JVM is now hot when measuring subsequent test runs.