[SPARK-15148][SQL] Upgrade Univocity library from 2.0.2 to 2.1.0

[HyukjinKwon]

What changes were proposed in this pull request?

https://issues.apache.org/jira/browse/SPARK-15148

Mainly it improves the performance roughtly about 30%-40% according to the release note. For the details of the purpose is described in the JIRA.

This PR upgrades Univocity library from 2.0.2 to 2.1.0.

How was this patch tested?

Existing tests should cover this.

[HyukjinKwon]

cc @rxin and @jbax (who is the author of Univocity library and suggested this change).

[rxin]

LGTM pending Jenkins.

[holdenk]

So doing a quick grep shows that we are using the newly deprecated method setParseUnescapedQuotes and setParseUnescapedQuotesUntilDelimiter, we should update to setUnescapedQuoteHandling as per the release notes ( https://github.com/uniVocity/univocity-parsers/releases )

If its really urgent to get this upgrade in quickly, lets make a follow up JIRA to move away from these deprecated functions for the next release.

[HyukjinKwon]

Thanks, @holdenk! It is not urgent. I can do this in this PR.

[holdenk]

Great!

[SparkQA]

Test build #2975 has finished for PR 12923 at commit e71c1ee.

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

[SparkQA]

Test build #57853 has finished for PR 12923 at commit e71c1ee.

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

[SparkQA]

Test build #57861 has finished for PR 12923 at commit e1e8063.

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

[srowen]

LGTM, except that it needs a rebase now

[SparkQA]

Test build #57875 has finished for PR 12923 at commit bf7262f.

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

[rxin]

Merging in master/branch-2.0.