[SPARK-20195][SPARKR][SQL] add createTable catalog API and deprecate createExternalTable

## What changes were proposed in this pull request?

Following up on #17483, add createTable (which is new in 2.2.0) and deprecate createExternalTable, plus a number of minor fixes

## How was this patch tested?

manual, unit tests

Author: Felix Cheung <felixcheung_m@hotmail.com>

Closes #17511 from felixcheung/rceatetable.