Add “checkStyle.xml” and “codeStyle.xml” files, varify the code-style when “mvn compile” and CI. This is the initialized commit.

1.Remove two useless ClusterConfig. 2.Adjust ClusterConfig.class and its mapping properties file,  rename to ’seed_nodes’ .

refactor ClusterContext and LocalContext implements Lookup interface that let the user of context just use lookup or findprovider method.

2. created workerref class use for cover akka actorref class