DRILL-7115: Improve Hive schema show tables performance
1. To make SHOW TABLES for Hive schema work much faster, additional Drill
feature of showing only accesible tables when Storage-Based authorization
is enabled was sacrificed. Now the behaviour matches to Hive/Beeline, all
tables will be shown despite of accessibility. For details about previous
show tables results, check description of DRILL-540.
2. In HiveDatabaseSchema implemented faster getTableNamesAndTypes() method
and removed bulk related code.
3. Deprecated bulk related options and removed bulk code from AbstractSchema,
DrillHiveMetastoreClient.
4. For 8000 Hive tables query returned in 1.8 seconds, for combination of
4000 tables and 8000 views query returned in 2.3 seconds. Note, that
after first query table names will be cached and next queries will perform
in less than 1 sec.
5. Refactored WorkspaceSchemaFactory's getTableNamesAndTypes()
method to reuse existing getViews() method.
6. DrillHiveMetastoreClient was refactored. Classes were unnested and enclosed
within client package with restricted visibility. Also was updated cache
values type to avoid unnecessarry List to Set back and forth conversions.
Client creation methods moved to separate class. So the new package
exposes only factory and client class.
closes #1706
