Updated Streaming tests

Major changes are as follows:
- Added more tests - updateStateByKey, GroupByKeyAndWindow, ReduceByKeyAndWindow
- Updated config and main run script to make it easier to disable tests of certain modules, without having comments the tests of those modules one-by-one (maybe I should consider uncommenting all the tests, and use the variables to disable them by default)

Personal style nit, but I find Scala 2.10 string interpolation (`s"counts (${partitionCounts.size})..."`way easier to read than string concatenation.