KYLIN-4254: The result exporting from Insight with CSV format is empty, when sql contains Chinese

[zhangxiang17]

1. change the tomcat's default decoding to 'UTF-8' in server.xml

[asf-ci]

Can one of the admins verify this patch?

[codecov-io]

Codecov Report

Merging #938 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #938   +/-   ##
=========================================
  Coverage     25.57%   25.57%           
  Complexity     6139     6139           
=========================================
  Files          1412     1412           
  Lines         85072    85072           
  Branches      11928    11928           
=========================================
  Hits          21757    21757           
  Misses        61208    61208           
  Partials       2107     2107

Impacted Files	Coverage Δ	Complexity Δ
...n/rest/security/PasswordPlaceholderConfigurer.java	0% <ø> (ø)	0 <0> (ø)	⬇️

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[coveralls]

Pull Request Test Coverage Report for Build 5217

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 28.055%

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Totals
Change from base Build 5214:	0.0%
Covered Lines:	23867
Relevant Lines:	85072

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💛 - Coveralls