first stuff for benchmark suite
Merge branch 'benchmark' of github.com:comsysto/jumbodb into benchmark

* 'benchmark' of github.com:comsysto/jumbodb:
  refactoring, use some more config parameters during generation
  minor refactoring
  enhance data generation performance
  rename dataSetSizeInBytes to dataSetSizeInChars

Conflicts:
	benchmark/generator/src/test/resources/testConfigFile.json