[impala] OPSAPS-17389 Add Impala Catalog DB commands to python API
[impala] OPSAPS-17389 Add Impala Catalog DB commands to python API

Also fixes up related hive command to declare api version and
fix typo in comment.

cloudera/cm_api,cloudera/cm_api,cdapio/cm_api,cdapio/cm_api,cdapio/cm_api,cloudera/cm_api,cdapio/cm_api