Merge pull request #23 from federecio/develop

fix issue where empty values are not ignored using Bulk API and are receiving same treatment as #N/A values
initial changes to migrate to junit4
add surefire-junit4 dependency to maven surefire plugin
fix file not found issues in tests due to capitalization mismatch - note: need to get a case sensitive file system
add missing static modifier to @Parameterized.Parameters method
test cleanup
simplify parameterized tests configuration
remove unused code as a result of the junit 4 migration and its build-in capability of parametrized tests