fix(i18n): subscription translations not loaded

* fix PathPatternMatching to load resources from all jars
* adapt tests that were already showing the issue (only resources from src/test/resources/i18n were loaded. src/main/resources/i18n was ignored)

Covers [RUNTIME-1769](https://bonitasoft.atlassian.net/browse/RUNTIME-1769)

Report of   bonitasoft/bonita-web-sp@6f8f9ed

bpm/bonita-web-server/src/main/java/org/bonitasoft/console/common/server/i18n/I18n.java

@@ -96,7 +96,7 @@ private TreeMap<String, String> loadLocale(final LOCALE locale, List<File> files
     public List<InputStream> getStreams(LOCALE locale) {
         ResourcePatternResolver patternResolver = new PathMatchingResourcePatternResolver();
         try {
-            Resource[] resources = patternResolver.getResources("classpath:/i18n/" + getLocaleRegexForResource(locale));
+            Resource[] resources = patternResolver.getResources("classpath*:i18n/" + getLocaleRegexForResource(locale));
             List<InputStream> streams = new ArrayList<>(resources.length);
             for (Resource resource : resources) {
                 InputStream stream = resource.getInputStream();

bpm/bonita-web-server/src/test/java/org/bonitasoft/console/common/server/i18n/I18nTest.java

@@ -30,13 +30,14 @@ public class I18nTest {
     @Test
     public void getStreams_should_read_from_classpath() {
         final List<InputStream> streams = I18n.getInstance().getStreams(AbstractI18n.LOCALE.fr);
-        assertThat(streams).hasSize(3);
+        //retrieving resources from both src/test/resources and src/main/resources
+        assertThat(streams).hasSize(6);
         assertThat(streams.get(0)).isNotNull();
     }
 
     @Test
     public void getStreams_should_not_fail_if_no_resource_found() {
-        final List<InputStream> streams = I18n.getInstance().getStreams(AbstractI18n.LOCALE.es);
+        final List<InputStream> streams = I18n.getInstance().getStreams(AbstractI18n.LOCALE.de);
         assertThat(streams).isEmpty();
     }