7197491: update copyright year to match last edit in jdk8 jdk repository
Reviewed-by: chegar, ksrini

8000245: SimpleDateFormat.format(date, StringBuffer, FieldPosition) doesn't work as expected with custom extensions
8000273: java.util.Locale.getDisplayVariant(Locale l) isn't transferred to the custom service provider
8000615: JRE adapter: timezone name of en_US is changed when extension directory is added
Reviewed-by: okutsu

6943119: Rebrand source copyright notices
Reviewed-by: darcy, weijun

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