Revision 2096

* Thuban/Model/postgisdb.py (PostGISTable.__init__): New parameter
id_column to specify which column to use to identify rows.  Also
new instance variables id_column and quoted_id_column
(PostGISTable.RowIdToOrdinal, PostGISTable.RowOrdinalToId)
(PostGISTable.ReadRowAsDict, PostGISTable.ReadValue)
(PostGISTable.SimpleQuery): Use the id column name provided to the
constructor instead of "gid"
(PostGISShapeStore.__init__): New parameter id_column analogously
to PostGISTable.__init__.  This parameter is simply passed through
to the base class constructor
(PostGISShapeStore._create_col_from_description): Fix typo in
doc-string
(PostGISShapeStore.Shape, PostGISShapeStore.AllShapes)
(PostGISShapeStore.ShapesInRegion): Use the id column name
provided to the constructor instead of "gid"

* test/postgissupport.py
(PostgreSQLServer.get_default_static_data_db): New static table
landmarks_point_id with an id column != "gid.  Update the comments
a bit.
(skip_if_addgeometrycolumn_does_not_use_quote_ident): Fix typo in
doc-
(upload_shapefile): New parameter gid_column to use a name other
than "gid" for the column to store the shape ids

* test/test_postgis_db.py (TableTests): New.  Mixin-class
containing all tests previously in TestPostGISTable.  The actual
tests are the same but the code is a bit more configurable to
allow for different id columns etc.
(TestPostGISTable): Derive from TableTests now for the actual
tests.
(TestPostGISTableExplicitGIDColumn): New. Like TestPostGISTable
except that it the landmarks_point_id table to test the id_column
parameter
(PointTests): Extend the doc-string
(TestPostGISShapestorePointExplicitGIDColumn)
(TestPostGISShapestorePointOIDAsGIDColumn): New classes derived
from PointTests to test the explicit id_column parameter.  One
tests with the name of the column holding the shape ids, the other
uses PostgreSQL's OID column.  For the latter a number of methods
have to be overwritten to make them independent of the actual id
values.