[IMP] account_statement_base_import: Improved system to inherit selection of the different import types, because as it was, you have to redefine the field on each extension module, due to OpenERP doesn't allow direct inheritance on selection methods.

Now, the selection method calls another private method that can be inherited without problems.

account_statement_base_import/statement.py

@@ -32,11 +32,12 @@ class AccountStatementProfil(Model):
     _inherit = "account.statement.profile"
 
     def get_import_type_selection(self, cr, uid, context=None):
-        """
-        Has to be inherited to add parser
-        """
+        """This is the method to be inherited for adding the parser"""
         return [('generic_csvxls_so', 'Generic .csv/.xls based on SO Name')]
 
+    def _get_import_type_selection(self, cr, uid, context=None):
+        return self.get_import_type_selection(cr, uid, context=context)
+
     _columns = {
         'launch_import_completion': fields.boolean(
             "Launch completion after import",
@@ -46,12 +47,11 @@ class AccountStatementProfil(Model):
         #  we remove deprecated as it floods logs in standard/warning level sob...
         'rec_log': fields.text('log', readonly=True),  # Deprecated
         'import_type': fields.selection(
-            get_import_type_selection,
+            _get_import_type_selection,
             'Type of import',
             required=True,
             help="Choose here the method by which you want to import bank"
                  "statement for this profile."),
-
     }
 
     _defaults = {