Added further author tags

Issue: SPR-1528

spring-beans/src/main/java/org/springframework/beans/propertyeditors/TimeZoneEditor.java

@@ -27,6 +27,7 @@ import org.springframework.util.StringUtils;
  * representation.
  *
  * @author Juergen Hoeller
+ * @author Nicholas Williams
  * @since 3.0
  * @see java.util.TimeZone
  * @see ZoneIdEditor

spring-beans/src/main/java/org/springframework/beans/propertyeditors/ZoneIdEditor.java

@@ -24,7 +24,7 @@ import java.time.ZoneId;
  * {@code ZoneId} objects. Exposes the {@code TimeZone} ID as a text
  * representation.
  *
- * @author Juergen Hoeller
+ * @author Nicholas Williams
  * @since 4.0
  * @see java.time.ZoneId
  * @see TimeZoneEditor

spring-context/src/main/java/org/springframework/context/i18n/TimeZoneAwareLocaleContext.java

@@ -26,6 +26,7 @@ import java.util.TimeZone;
  * be able to produce a non-null TimeZone at the moment.
  *
  * @author Juergen Hoeller
+ * @author Nicholas Williams
  * @since 4.0
  * @see LocaleContextHolder#getTimeZone()
  */