调度中心移除SQL中的 "now()" 函数；集群部署时不再依赖DB时钟，仅需要保证调度中心应用节点时钟一致即可；

xxl-job-admin/src/main/resources/mybatis-mapper/XxlJobRegistryMapper.xml

@@ -19,7 +19,7 @@
 		t.update_time
 	</sql>
 
-	<select id="findDead" parameterType="java.lang.Integer" resultType="java.lang.Integer" >
+	<select id="findDead" parameterType="java.util.HashMap" resultType="java.lang.Integer" >
 		SELECT t.id
 		FROM xxl_job_registry AS t
 		WHERE t.update_time <![CDATA[ < ]]> DATE_ADD(#{nowTime},INTERVAL -#{timeout} SECOND)
@@ -33,7 +33,7 @@
 		</foreach>
 	</delete>
 
-	<select id="findAll" parameterType="java.lang.Integer" resultMap="XxlJobRegistry">
+	<select id="findAll" parameterType="java.util.HashMap" resultMap="XxlJobRegistry">
 		SELECT <include refid="Base_Column_List" />
 		FROM xxl_job_registry AS t
 		WHERE t.update_time <![CDATA[ > ]]> DATE_ADD(#{nowTime},INTERVAL -#{timeout} SECOND)