Author: Holden Karau <holden@pigscanfly.ca>

Closes #6464 from holdenk/SPARK-7910-expose-partitioner-information-in-javardd and squashes the following commits:

de1e644 [Holden Karau] Fix the test to get the partitioner
bdb31cc [Holden Karau] Add Mima exclude for the new method
347ef4c [Holden Karau] Add a quick little test for the partitioner JavaAPI
f49dca9 [Holden Karau] Add partitoner information to JavaRDDLike and fix some whitespace