Fixing flaky tests in DateTest4_indian and DateTest5_iso8601

[OrDTesters]

test_date in DateTest4_indian and DateTest5_iso8601 has a test-order dependency and it fails when they are run by themselves.

test_date can be fixed by running a setup to change the time and locale to "Asia/Shanghai" and "China" (respectively). This setup is the same as the one in the DateTest class that these tests were depending on. The fix will enable test_date in the two classes to now pass in any test run order and by itself. Without the fix, the tests will get the following error. Let me know if you want to discuss more.

junit.framework.AssertionFailedError: 
Expected :83419000
Actual   :29419000
	at junit.framework.Assert.fail(Assert.java:57)
	at junit.framework.Assert.failNotEquals(Assert.java:329)
	at junit.framework.Assert.assertEquals(Assert.java:78)
	at junit.framework.Assert.assertEquals(Assert.java:159)
	at junit.framework.Assert.assertEquals(Assert.java:166)
	at junit.framework.TestCase.assertEquals(TestCase.java:324)
	at com.alibaba.json.bvt.serializer.date.DateTest5_iso8601.test_date(DateTest5_iso8601.java:27)

[codecov-io]

Codecov Report

Merging #2148 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2148      +/-   ##
============================================
- Coverage     81.67%   81.66%   -0.02%     
+ Complexity     6784     6780       -4     
============================================
  Files           140      140              
  Lines         25360    25360              
  Branches       6055     6055              
============================================
- Hits          20713    20709       -4     
- Misses         2930     2931       +1     
- Partials       1717     1720       +3

Impacted Files	Coverage Δ	Complexity Δ
...com/alibaba/fastjson/parser/JSONReaderScanner.java	72.61% <0%> (-1.28%)	44% <0%> (-1%)
...n/java/com/alibaba/fastjson/util/JavaBeanInfo.java	87.5% <0%> (-0.19%)	191% <0%> (-1%)
...java/com/alibaba/fastjson/parser/ParserConfig.java	82.38% <0%> (-0.19%)	185% <0%> (-1%)

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