[SPARK-9388] [yarn] Make executor info log messages easier to read.

[vanzin]

No description provided.

[sryza]

Nit: capitalize all of YARN

[rxin]

Would it be better to combine them into a single logging statement to avoid interleaved logging messages?

[SparkQA]

Test build #38610 has finished for PR 7706 at commit 028b990.

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

[srowen]

Looks OK to me

[tgravescs]

nit indentation to match below.

[vanzin]

Actually the indentation is in the generated string (yes, a little confusing, but this way it aligns properly).

[tgravescs]

looks good. minor indentation if you want to fix.

[andrewor14]

LGTM retest this please

[SparkQA]

Test build #38741 has finished for PR 7706 at commit 028b990.

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

[vanzin]

Failure in unrelated part of the code. Let's try one more time.

[vanzin]

Jenkins retest this please.

[SparkQA]

Test build #38773 has finished for PR 7706 at commit 028b990.

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

[SparkQA]

Test build #141 has finished for PR 7706 at commit 028b990.

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

[vanzin]

Merged to master.