[SPARK-25972][PYTHON] Missed JSON options in streaming.py

[MaxGekk]

What changes were proposed in this pull request?

Added JSON options for json() in streaming.py that are presented in the similar method in readwriter.py. In particular, missed options are dropFieldIfAllNull and encoding.

[MaxGekk]

@HyukjinKwon Thank you for pointing out the missed options. Please, have a look at the PR.

[HyukjinKwon]

Oh, let's name it [PYTHON] BTW.

[SparkQA]

Test build #98589 has finished for PR 22973 at commit da697ac.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[MaxGekk]

Oh, let's name it [PYTHON] BTW.

I see some of on-going PR have tag [PYSPARK]. Is this somewhere documented?

[HyukjinKwon]

Yea .. actually that's documented in https://spark.apache.org/contributing.html . Strictly it should be PYTHON

The PR title should be of the form [SPARK-xxxx][COMPONENT] Title, where SPARK-xxxx is the relevant JIRA number, COMPONENT is one of the PR categories shown at spark-prs.appspot.com and Title may be the JIRA’s title or a more specific title describing the PR itself.

I tried to be clear for myself so I took a look before but .. not a big deal at all :D.

[SparkQA]

Test build #98639 has finished for PR 22973 at commit 4ca71fc.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #98695 has finished for PR 22973 at commit 5b132ce.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[HyukjinKwon]

Merged to master.