fixed issue #742, improve h2 config

deployer/src/main/resources/spring/tsdb/h2-tsdb.xml

@@ -31,8 +31,8 @@
     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
         <property name="driverClassName" value="org.h2.Driver" />
 		<property name="url" value="${canal.instance.tsdb.url:}" />
-		<property name="username" value="${canal.instance.tsdb.dbUsername:canal}" />
-		<property name="password" value="${canal.instance.tsdb.dbPassword:canal}" />
+		<property name="username" value="${canal.instance.tsdb.dbUsername:}" />
+		<property name="password" value="${canal.instance.tsdb.dbPassword:}" />
       	<property name="maxActive" value="30" />
         <property name="initialSize" value="0" />
         <property name="minIdle" value="1" />

deployer/src/main/resources/spring/tsdb/mysql-tsdb.xml

@@ -31,8 +31,8 @@
     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
         <property name="driverClassName" value="com.mysql.jdbc.Driver" />
 		<property name="url" value="${canal.instance.tsdb.url:}" />
-		<property name="username" value="${canal.instance.tsdb.dbUsername:canal}" />
-		<property name="password" value="${canal.instance.tsdb.dbPassword:canal}" />
+		<property name="username" value="${canal.instance.tsdb.dbUsername:}" />
+		<property name="password" value="${canal.instance.tsdb.dbPassword:}" />
         <property name="maxActive" value="30" />
         <property name="initialSize" value="0" />
         <property name="minIdle" value="1" />