Memoization of `all` may cause issues

[tagliala]

hawk/lib/hawk/model/proxy.rb

Lines 40 to 42 in d348cb5

	def all(params = {})
	@result ||= klass.all(@params.deep_merge(params))
	end

This is not taking into consideration the fact that there could be different parameters.

Probably memoization here is wrong