for #601, removed useless dbunit codes for sharding-jdbc pom.xml
for #601, removed useless dbunit codes for sharding-jdbc pom.xml

leeyazhou/sharding-jdbc,leeyazhou/sharding-jdbc,leeyazhou/sharding-jdbc,apache/incubator-shardingsphere,leeyazhou/sharding-jdbc,apache/incubator-shardingsphere,apache/incubator-shardingsphere,apache/incubator-shardingsphere