Fix GeoCatalog and ReadRowSet thread
Set fetch size, does not seem to have any effect on memory
Change unit test, H2GIS TableLocation has been changed
Merge pull request #633 from nicolas-f/fix/geocatalog_schema

Fix GeoCatalog schema.

* Use a label rather than the complete table identifier when loading table from the GeoCatalog
* Fix thread release on ReadRowSet when a complete table selection is done
* Show a warning if the entire table has to be loaded in memory (for example, when loading a PostGIS table without a primary key)