Set autoincrement for pk's in ORM

[margrietpalm]

During the conversion to geopackage primary keys get the AUTOINCREMENT property.

before:

select sql from sqlite_master where name = "surface_map";
CREATE TABLE "surface_map" (id INTEGER PRIMARY KEY NOT NULL,connection_node_id INTEGER,surface_id INTEGER,percentage FLOAT,tags TEXT,code VARCHAR(100),display_name VARCHAR(255), "geom" LINESTRING NOT NULL DEFAULT '')

after:

select sql from sqlite_master where name = "surface_map";
CREATE TABLE "surface_map" ( "id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "geom" LINESTRING NOT NULL, "connection_node_id" MEDIUMINT, "surface_id" MEDIUMINT, "percentage" REAL, "tags" TEXT, "code" TEXT, "display_name" TEXT)

This is not matched by the ORM