[SPARK-4822] Use sphinx tags for Python doc annotations

[Lewuathe]

Modify python annotations for sphinx. There is no change to build process from.
https://github.com/apache/spark/blob/master/docs/README.md

[AmplabJenkins]

Can one of the admins verify this patch?

[jkbradley]

@Lewuathe Thanks for the PR! As long as you're fixing those, would you mind fixing the 2 "DeveloperApi" tags in pyspark/mllib/feature.py and the 2 "WARN" tags in pyspark/sql.py?

[mengxr]

ok to test

[mengxr]

add to whitelist

[mengxr]

test this please

[SparkQA]

Test build #24561 has started for PR 3685 at commit 88a0fd9.

• This patch merges cleanly.

[mengxr]

LGTM. Waiting for Jenkins ...

[davies]

LGTM, thanks!

[jkbradley]

@Lewuathe I believe there are 2 more tags to fix (1 more DeveloperAPI and 1 more WARN tag) in those same files. (Thanks!)

[SparkQA]

Test build #24561 has finished for PR 3685 at commit 88a0fd9.

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

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/SparkPullRequestBuilder/24561/
Test PASSed.

[jkbradley]

Oops, I was wrong. LGTM
Thanks!

[mengxr]

Merged into master. Thanks!