Merge pull request #194 from arpitgupta/working

remove duplicate logging
adding assertion
adding logging
adding logging
better assert
Merge pull request #195 from raghavgautam/master

minor changes
increasing sleep duration
check added
Merge pull request #188 from pisaychuk/master

extra check added
print failure stack trace in the logs
improve asserts
assert fixed
total instances assert improved
vararg warnings fixed
Merge pull request #190 from rostafiychuk/varargs

vararg warnings fixed
Merge pull request #189 from rostafiychuk/asserts

improve asserts
prevent baseHDFSDir deleting
createDir() calls deleteDirIfExists() before creating
this is problem for parallel test executing
baseHDFSDir -> baseTestHDFSDir
documentation added
startLimit folder shouldn't be included