Use ilike operator as One2One default search operator

issue10977
review374271002
(grafted from b41c0e2d6a2f41743bda0cdeaeb070d68a2ba18b)

--HG--
branch : 6.0

tryton/common/domain_parser.py

@@ -177,7 +177,7 @@ def append_ending_clause(domain, clause, deep):
 def default_operator(field):
     "Return default operator for field"
     if field['type'] in ('char', 'text', 'many2one', 'many2many', 'one2many',
-            'reference'):
+            'reference', 'one2one'):
         return 'ilike'
     elif field['type'] == 'multiselection':
         return 'in'