Raise default release to 25 and log it

Author: mkoncek

src/main/java/org/fedoraproject/javapackages/validator/Main.java

@@ -243,13 +243,15 @@ private void compileFiles() throws IOException {
             compilerOptions.add("-proc:none");
 
             compilerOptions.add("--release");
-            compilerOptions.add(props.getProperty("compiler.release", "23"));
+            compilerOptions.add(props.getProperty("compiler.release", "25"));
 
             if (!parameters.classPaths.isEmpty()) {
                 compilerOptions.add("-cp");
                 compilerOptions.add(parameters.classPaths.stream().map(Path::toString).collect(Collectors.joining(":")));
             }
 
+            logger.debug("Compiler options: {0}", Decorated.plain(compilerOptions));
+
             try {
                 var output = new StringWriter();
                 new PrintWriter(output).println("Failed to compile sources:");