增加flume_client的单元测试
	modified:   consumer/flume_client.go
	modified:   consumer/log_sink.go
	consumer/flume_client_test.go
修改因为thrift代码生成器、生成flume的body为binary类型，而导致flume的无法解析body,因为flume读到了0(STOP)所以就不解析.....并增加了压力测试代码
Merge branch 'master' of https://github.com/blackbeans/flume-log-sdk