[SPARK-15171][SQL] Remove the references to deprecated method
dataset.registerTempTable
## What changes were proposed in this pull request?
Update the unit test code, examples, and documents to remove calls to
deprecated method `dataset.registerTempTable`.
## How was this patch tested?
This
[SPARK-15171][SQL] Remove the references to deprecated method
dataset.registerTempTable
## What changes were proposed in this pull request?
Update the unit test code, examples, and documents to remove calls to
deprecated method `dataset.registerTempTable`.
## How was this patch tested?
This