[SPARK-3868][PySpark] Hard to recognize which module is tested from unit-tests.log

[cocoatomo]

./python/run-tests script display messages about which test it is running currently on stdout but not write them on unit-tests.log.
It is harder for us to recognize what test programs were executed and which test was failed.

[AmplabJenkins]

Can one of the admins verify this patch?

[davies]

LGTM.

Jenkins, test this please.

[SparkQA]

QA tests have started for PR 2724 at commit c63d9fa.

• This patch merges cleanly.

[SparkQA]

QA tests have finished for PR 2724 at commit c63d9fa.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds the following public classes (experimental):
  • abstract class AbstractParams[T: TypeTag]
  • case class Params(inputFile: String = null, threshold: Double = 0.1)
  • class Word2VecModel(object):
  • class Word2Vec(object):
  • class SparkIMain(

[AmplabJenkins]

Can one of the admins verify this patch?

[davies]

@JoshRosen I think this one is ready to merge, how do you think of it?

[JoshRosen]

LGTM; thanks!