Improve standard output message in LogBase (#1357)

sentinel-core/src/main/java/com/alibaba/csp/sentinel/log/LogBase.java

@@ -84,10 +84,10 @@ public class LogBase {
         if (!LOG_OUTPUT_TYPE_FILE.equalsIgnoreCase(logOutputType) && !LOG_OUTPUT_TYPE_CONSOLE.equalsIgnoreCase(logOutputType)) {
             logOutputType = LOG_OUTPUT_TYPE_FILE;
         }
-        System.out.println("INFO: log output type is: " + logOutputType);
+        System.out.println("INFO: Sentinel log output type is: " + logOutputType);
 
         logCharSet = properties.getProperty(LOG_CHARSET) == null ? logCharSet : properties.getProperty(LOG_CHARSET);
-        System.out.println("INFO: log charset is: " + logCharSet);
+        System.out.println("INFO: Sentinel log charset is: " + logCharSet);
 
 
         logBaseDir = properties.getProperty(LOG_DIR) == null ? logBaseDir : properties.getProperty(LOG_DIR);
@@ -95,14 +95,14 @@ public class LogBase {
         File dir = new File(logBaseDir);
         if (!dir.exists()) {
             if (!dir.mkdirs()) {
-                System.err.println("ERROR: create log base dir error: " + logBaseDir);
+                System.err.println("ERROR: create Sentinel log base directory error: " + logBaseDir);
             }
         }
-        System.out.println("INFO: log base dir is: " + logBaseDir);
+        System.out.println("INFO: Sentinel log base directory is: " + logBaseDir);
 
         String usePid = properties.getProperty(LOG_NAME_USE_PID);
         logNameUsePid = "true".equalsIgnoreCase(usePid);
-        System.out.println("INFO: log name use pid is: " + logNameUsePid);
+        System.out.println("INFO: Sentinel log name use pid is: " + logNameUsePid);
     }