Fix test failures

Author: vy

log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/FileAppenderTest.java

@@ -265,7 +265,7 @@ private static void writer(
     private void verifyFile(final int count) throws Exception {
         // String expected = "[\\w]* \\[\\s*\\] INFO TestLogger - Test$";
         final String expected =
-                "^\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2},\\d{3} \\[[^\\]]*\\] INFO TestLogger - Test";
+                "^\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}.\\d{3} \\[[^\\]]*\\] INFO TestLogger - Test";
         final Pattern pattern = Pattern.compile(expected);
         int lines = 0;
         try (final BufferedReader is = new BufferedReader(new InputStreamReader(new FileInputStream(FILE_NAME)))) {

log4j-core-test/src/test/java/org/apache/logging/log4j/core/config/plugins/LegacyPluginTest.java

@@ -188,7 +188,7 @@ public void testBadPattern() {
         final String str = buf.toString();
 
         // eats all characters until the closing '}' character
-        final String expected = "[2001-02-03 04:05:06,789] - Hello, world";
+        final String expected = "[2001-02-03 04:05:06.789] - Hello, world";
         assertTrue(str.startsWith(expected), "Expected to start with: " + expected + ". Actual: " + str);
     }