Factored out the handling of "defaultLocale+otherLocale" special property in a separated OtherLocales class.
This is currently used only by DefaultMetadata, but we will need to leverage that OtherLocales class in the
DefaultDataIdentification class too when we will implement ISO 19115:2014-3 XML marshalling.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK8@1631200 13f79535-47bb-0310-9956-ffa450edef68