code: fix typo (#76)

* Update ob_dtl_rpc_channel.cpp

* Update ob_time_convert.cpp

* Update ob_time_convert.h

* Update ob_expr_date_add.cpp

* fix log spell error:faild -> failled, Faild -> Failed

* Update ob_optimizer_util.cpp

* Update ob_sql.cpp

* Update ob_optimizer_util.cpp

* Update ob_plan_cache_manager.cpp

* Update ob_partition_merge_task.cpp

src/sql/engine/basic/ob_expr_values_op.cpp

@@ -260,7 +260,7 @@ int ObExprValuesOp::inner_get_next_row()
   if (OB_SUCC(ret)) {
     plan_ctx->set_autoinc_id_tmp(0);
     if (OB_FAIL(try_check_status())) {
-      LOG_WARN("check physical plan status faild", K(ret));
+      LOG_WARN("check physical plan status failed", K(ret));
     }
   }