Details
Description
We should skips tests that use the Hadoop libraries while running
on CRAN check with Windows as the operating system. This is to handle
cases where the Hadoop winutils binaries are not available on the target
system. The skipped tests will consist of
1. Tests that save, load a model in MLlib
2. Tests that save, load CSV, JSON and Parquet files in SQL
3. Hive tests
Note that these tests will still be run on AppVeyor for every PR, so our overall test coverage should not go down