Warning, XXX: Benjamin Hack to perform fast scalability test base

In order to be able to fix the configuration consistency directly from this method.

Add 'cluster' word into the dict.
-> {'cluster':{xxx}, yyy}

Add test_suite to the option given to the instance XML configuration.

Add command line options to performance_tester in order to enable
searching of userInfo and benchmark test files in specified paths.

Add an path list argument to objectFromModule in order to search
module into.

In order to run tests faster during development,
sleep times have been disabled.

Change binary runScalabilityTestsuite to runScalabilityTestSuite

Apply fix from commit : b111682f