[SPARK-13796] Redirect error message to logWarning

[nishkamravi2]

What changes were proposed in this pull request?

Redirect error message to logWarning

How was this patch tested?

Unit tests, manual tests

@JoshRosen

[SparkQA]

Test build #54477 has finished for PR 12052 at commit 4dc9c79.

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

[andrewor14]

Looks a lot like #11969. :) @JoshRosen

[andrewor14]

retest this please

[SparkQA]

Test build #54572 has finished for PR 12052 at commit 4dc9c79.

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

[andrewor14]

retest this please

[SparkQA]

Test build #54587 has finished for PR 12052 at commit 4dc9c79.

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

[andrewor14]

Merging into master thanks.

[nishkamravi2]

Thanks @andrewor14