////dubbo+zookeeper logfactory架包冲突解决方法：
compile(group:'com.alibaba',name:'dubbo',version:'2.5.3') {
exclude(module:'spring')
excludegroup:"org.slf4j",module:"slf4j-log4j12"
}
compile ("org.apache.zookeeper:zookeeper:3.4.6"){
excludegroup:"org.slf4j",module:"slf4j-log4j12"
excludegroup:"log4j",module:"log4j"
}
compile'com.github.sgroschupf:zkclient:0.1'
