[IOTDB-68]Add basic cluster framework, non-query module and query metadata module

[fanhualta]

This PR is the first part of the distributed version, which includes the following changes:

1. Add basic cluster framework. Mainly in package entity and rpc.raft.
2. Add non-query module, including functions: set storage group, create timeseries, insert、update、delete data，change authority. Mainly in package qp and rpc.raft.
3. Add query metadata module, including show storage group and show timeseries. Mainly in package qp and rpc.raft.
   Corresponding Jira issue link: https://issues.apache.org/jira/browse/IOTDB-68

[qiaojialin]

#460