Make insert return an array, and include the id_value if super return…

…s nil

The super is not returning the id_value if it is available (as it used
to). Furthermore ActiveRecord::Persistence#_create_record expects an
array of values.

lib/active_record/connection_adapters/oracle_enhanced/database_statements.rb

@@ -88,7 +88,7 @@ def sql_for_insert(sql, pk, binds)
 
         def insert(arel, name = nil, pk = nil, id_value = nil, sequence_name = nil, binds = [])
           pk = nil if id_value
-          super
+          Array(super || id_value)
         end
 
         # New method in ActiveRecord 3.1