fix test ripples and minor parfait naming

Parfait ruby and boot names desynced, fixed that

lib/parfait/behaviour.rb

@@ -37,7 +37,7 @@ module Parfait
     def get_instance_method( fname )
       raise "get_instance_method #{fname}.#{fname.class}" unless fname.is_a?(Symbol)
       #if we had a hash this would be easier.  Detect or find would help too
-      self.methods.find {|m| m.name == fname }
+      self.instance_methods.find {|m| m.name == fname }
     end
 
     # get the method and if not found, try superclasses. raise error if not found