BACKLOG-774 Uncommited old \ ignored unit tests

This functional was relocation on pentaho-platform-extension project. Some methods, which uses on the past, no actually: 
class MetadataDomainRepository is not exist. This functional was include on PentahoMetadataDomainRepository class getLocaleFromPropertyfilename() & getLocalePropertyFilenames() are not exists. This functionality was included on methods Domain.getLocaleCodes() & Domain.getLocales() & Domain.addLocale( LocaleType locale ).
Test Methods testImportPropertyFile() & testImportLocalizationEmptyPropertyFile() was deleted, because this cases was verify on PentahoMetadataDomainRepositoryTest.testLoadLocaleStrings().