spark

[SPARK-20781] the location of Dockerfile in docker.properties.templat is wrong

[SPARK-20506][DOCS] 2.2 migration guide

[SPARKR] Fix bad examples in DataFrame methods and style issues

[SPARKR][DOCS][MINOR] Use consistent names in rollup and cube examples

[SPARK-20763][SQL] The function of `month` and `day` return the value which is not we expected.