Fix timezone problem of sentinel-block.log

Signed-off-by: Eric Zhao <sczyh16@gmail.com>

sentinel-core/src/main/java/com/alibaba/csp/sentinel/eagleeye/FastDateFormat.java

@@ -75,7 +75,7 @@ class FastDateFormat {
 
     private SimpleDateFormat createSimpleDateFormat() {
         SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
-        fmt.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
+        fmt.setTimeZone(TimeZone.getDefault());
         return fmt;
     }
 }

sentinel-core/src/test/java/com/alibaba/csp/sentinel/eagleeye/EagleEyeCoreUtilsTest.java

@@ -15,6 +15,8 @@
  */
 package com.alibaba.csp.sentinel.eagleeye;
 
+import java.util.TimeZone;
+
 import org.junit.Assert;
 import org.junit.Rule;
 import org.junit.Test;
@@ -153,8 +155,8 @@ public class EagleEyeCoreUtilsTest {
 
     @Test
     public void testFormatTime() {
-        Assert.assertEquals("2019-06-15 20:13:14.000",
-                EagleEyeCoreUtils.formatTime(1560600794000L));
+        Assert.assertEquals("2019-06-15 12:13:14.000",
+                EagleEyeCoreUtils.formatTime(1560600794000L - TimeZone.getDefault().getRawOffset()));
     }
 
     @Test