RFR 8158880: java/time/tck/java/time/format/TCKDateTimeFormatterBuilder.java fail with zh_CN locale

[Bhanu Gopularam]

Hi all,

May I request you to review fix for following issue
Bug id: https://bugs.openjdk.java.net/browse/JDK-8158880 

Solution: To avoid test failure in non english locales, set the default locale 
while initial test setup

Webrev: http://cr.openjdk.java.net/~bgopularam/JDK-8158880/webrev.00/ 

Thanks,
Bhanu