fix findermethods name

app/repositories/orient_db/collection_repository.rb

 module OrientDb
   class CollectionRepository < Base
     include OrientDb::Methods::EdgeMethods
-    include OrientDb::Methods::GenericMethods
+    include OrientDb::Methods::FinderMethods
 
     def build_object(args={})
       Collection.new(map_object_hash(args))