AMBARI-23027. Add backup/copy znode command for infra-solr-client. (#417)

* AMBARI-23027. Add backup/copy znode command for infra-solr-client.

* AMBARI-23027. Add missing license header.

* AMBARI-23027. Fix transfer-znode flag.

* AMBARI-23027. Fix example.

* AMBARI-23027. Fix arg name

* AMBARI-23027. Add proper descriptions

* AMBARI-23027. Fix imports (do not use *)
4 files changed