Minor refactoring of initial schemes import code to ease overriding

by e.g. saem_ref which want to assign ark to created schemes.

dataimport.py

@@ -105,6 +105,11 @@ def lcsv_check(cnx, store, fname, scheme_uri):
         list(lcsv2rdf.triples())
 
 
+def init_seda_scheme(cnx, title):
+    description = u'edition 2009' if title.startswith('SEDA :') else None
+    return cnx.create_entity('ConceptScheme', title=title, description=description)
+
+
 def import_seda_schemes(cnx, lcsv_import=lcsv_import):
     """Import all LCSV data files defined in LCSV_FILES"""
     if cnx.repo.system_source.dbdriver == 'postgres':
@@ -116,9 +121,7 @@ def import_seda_schemes(cnx, lcsv_import=lcsv_import):
     for title, rtypes, etypes, fname in LCSV_FILES:
         if not cnx.find('ConceptScheme', title=title):
             print('importing', title.encode('utf-8'))
-            description = u'edition 2009' if title.startswith('SEDA :') else None
-            scheme = cnx.create_entity('ConceptScheme', title=title,
-                                       description=description)
+            scheme = init_seda_scheme(cnx, title)
             lcsv_import(cnx, store, fname, scheme.cwuri)
             if not isinstance(rtypes, tuple):
                 rtypes = (rtypes,)