Series import: improve parsing of non-perforated flag (make it case insensitive).

Author: php-coder

src/main/java/ru/mystamps/web/service/SeriesInfoExtractorServiceImpl.java

@@ -198,7 +198,7 @@ protected Boolean extractPerforated(String fragment) {
 
 		log.debug("Determining perforation from a fragment: '{}'", fragment);
 
-		boolean withoutPerforation = StringUtils.contains(fragment, "б/з")
+		boolean withoutPerforation = StringUtils.containsIgnoreCase(fragment, "б/з")
 			|| StringUtils.containsIgnoreCase(fragment, "беззубцовые");
 		if (withoutPerforation) {
 			log.debug("Perforation is false");