Modify canal-client config and polish consumer implementation

client-launcher/src/main/resources/canal-client.yml

@@ -1,6 +1,6 @@
 #canalServerHost: 127.0.0.1:11111
 #zookeeperHosts: slave1:2181
-bootstrapServers: slave1:6667,slave2:6667 #or rocketmq nameservers
+bootstrapServers: slave1:6667,slave2:6667 #or rocketmq nameservers:host1:9876;host2:9876
 flatMessage: true
 
 #canalInstances:
@@ -14,9 +14,9 @@ flatMessage: true
 
 mqTopics:
 - mqMode: rocketmq
-- topic: example
+  topic: example
   groups:
-  - groupId: example_g1
+  - groupId: example
     outAdapters:
     - name: logger
 #    - name: hbase