add DagHelperTest to pom

pom.xml

@@ -715,6 +715,7 @@
                         <include>**/dao/mapper/AlertMapperTest.java</include>
                         <include>**/dao/mapper/CommandMapperTest.java</include>
                         <include>**/dao/cron/CronUtilsTest.java</include>
+                        <include>**/dao/utils/DagHelperTest.java</include>
                         <include>**/alert/template/AlertTemplateFactoryTest.java</include>
                         <include>**/alert/template/impl/DefaultHTMLTemplateTest.java</include>
                         <include>**/server/worker/task/datax/DataxTaskTest.java</include>