[SPARK-24317][SQL]Float-point numbers are displayed with different precision in ThriftServer2

[cxzl25]

What changes were proposed in this pull request?

When querying float-point numbers , the values displayed on beeline or jdbc are with different precision.

SELECT CAST(1.23 AS FLOAT)
Result:
1.2300000190734863

According to these two jira:
HIVE-11802
HIVE-11832
Make a slight modification to the spark hive thrift server.

How was this patch tested?

HiveThriftBinaryServerSuite
test("JDBC query float-point number")

[mgaido91]

the change itself LGTM, cc @cloud-fan @gatorsmile: can we trigger a build for this?

[gatorsmile]

ok to test

[gatorsmile]

cc @liufengdb

[SparkQA]

Test build #90811 has finished for PR 21364 at commit 137abed.

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

[cxzl25]

@gatorsmile @liufengdb @cloud-fan
Could you please give some comments when you have time?
Thanks so much.

[AmplabJenkins]

Can one of the admins verify this patch?

[gatorsmile]

cc @srinathshankar @yuchenhuo