[Improve](sink) deafult open auto redirect (#304)

Automatic redirection is turned on by default when streamload is writing.
diff --git a/flink-doris-connector/src/main/java/org/apache/doris/flink/cfg/DorisOptions.java b/flink-doris-connector/src/main/java/org/apache/doris/flink/cfg/DorisOptions.java
index 9a4506a..f1dd2a5 100644
--- a/flink-doris-connector/src/main/java/org/apache/doris/flink/cfg/DorisOptions.java
+++ b/flink-doris-connector/src/main/java/org/apache/doris/flink/cfg/DorisOptions.java
@@ -81,7 +81,7 @@
         private String jdbcUrl;
         private String username;
         private String password;
-        private boolean autoRedirect;
+        private boolean autoRedirect = true;
         private String tableIdentifier;
 
         /** required, tableIdentifier. */
diff --git a/flink-doris-connector/src/main/java/org/apache/doris/flink/table/DorisConfigOptions.java b/flink-doris-connector/src/main/java/org/apache/doris/flink/table/DorisConfigOptions.java
index e7b5ce7..e368e31 100644
--- a/flink-doris-connector/src/main/java/org/apache/doris/flink/table/DorisConfigOptions.java
+++ b/flink-doris-connector/src/main/java/org/apache/doris/flink/table/DorisConfigOptions.java
@@ -72,7 +72,7 @@
     public static final ConfigOption<Boolean> AUTO_REDIRECT =
             ConfigOptions.key("auto-redirect")
                     .booleanType()
-                    .defaultValue(false)
+                    .defaultValue(true)
                     .withDescription(
                             "Use automatic redirection of fe without explicitly obtaining the be list");