attempt to fix failing tests by setting the date timezone

Author: TheSnoozer

src/test/java/pl/project13/core/GitCommitIdPluginIntegrationTest.java

@@ -1765,6 +1765,7 @@ public void shouldGiveCommitIdForEachFolderWhenPerModuleVersionsEnabled(boolean
                     .setDotGitDirectory(dotGitDirectory)
                     .setUseNativeGit(useNativeGit)
                     .setPerModuleVersions(true)
+                    .setDateFormatTimeZone("CET")
                     .setProjectBaseDir(dotGitDirectory.getParentFile().toPath().resolve(submoduleName).toFile())
                     .build();
     Properties properties = new Properties();