Enhancement: Add test case.

Author: yuanoOo

spark-connector-oceanbase/spark-connector-oceanbase-base/src/test/scala/com/oceanbase/spark/OBCatalogMySQLITCase.scala

@@ -153,6 +153,7 @@ class OBCatalogMySQLITCase extends OceanBaseMySQLTestBase {
       .config("spark.sql.catalog.ob.direct-load.enabled", "true")
       .config("spark.sql.catalog.ob.direct-load.host", getHost)
       .config("spark.sql.catalog.ob.direct-load.rpc-port", getRpcPort)
+      .config("spark.sql.catalog.ob.direct-load.username", getUsername.split("@").head)
       .getOrCreate()
 
     insertTestData(session, "products")

spark-connector-oceanbase/spark-connector-oceanbase-base/src/test/scala/com/oceanbase/spark/OceanBaseMySQLConnectorITCase.scala

@@ -75,6 +75,7 @@ class OceanBaseMySQLConnectorITCase extends OceanBaseMySQLTestBase {
                    |  "direct-load.enabled"=true,
                    |  "direct-load.host"="$getHost",
                    |  "direct-load.rpc-port"=$getRpcPort,
+                   |  "direct-load.username"=${getUsername.split("@").head},
                    |  "direct-load.write-thread-num"="1"
                    |);
                    |""".stripMargin)