[SPARK-28234][CORE][PYTHON] Add python and JavaSparkContext support to get resources

[tgravescs]

What changes were proposed in this pull request?

Add python api support and JavaSparkContext support for resources(). I needed the JavaSparkContext support for it to properly translate into python with the py4j stuff.

How was this patch tested?

Unit tests added and manually tested in local cluster mode and on yarn.

[SparkQA]

Test build #107413 has finished for PR 25087 at commit 6515601.

• This patch fails Python style tests.
• This patch merges cleanly.
• This patch adds no public classes.

[tgravescs]

@mengxr @jiangxb1987 @Ngone51

[SparkQA]

Test build #107415 has finished for PR 25087 at commit 7e3f4f9.

• This patch fails Spark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[HyukjinKwon]

retest this please

[SparkQA]

Test build #107423 has finished for PR 25087 at commit 7e3f4f9.

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

[BryanCutler]

Looks good, just had a couple style comments

[HyukjinKwon]

Yea, looks fine to me in general too.

[tgravescs]

thanks for the reviews and suggestions, I've updated.

[SparkQA]

Test build #107459 has finished for PR 25087 at commit e6b24d9.

• This patch fails PySpark unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #107468 has finished for PR 25087 at commit c4c02f5.

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

[HyukjinKwon]

Merged to master.