Return error when Territory.info/1 has no info

Make currency info sorted to be deterministic
Fix currency tests (CUP no longer exists, use :HT example)

# Conflicts:
#	mix.exs
#	mix.lock
#	test/territory_test.exs

lib/cldr/exception.ex

@@ -69,3 +69,15 @@ defmodule Cldr.UnknownSubdivisionError do
   %__MODULE__{message: message}
   end
 end
+
+defmodule Cldr.UnknownInformationError do
+  @moduledoc """
+  Exception raised when there is a missing information.
+  """
+
+  defexception [:message]
+
+  def exception(message) do
+  %__MODULE__{message: message}
+  end
+end

lib/cldr/territory.ex

@@ -663,6 +663,10 @@ defmodule Cldr.Territory do
          population: 65761100
        }}
 
+      iex> Cldr.Territory.info(:"155")
+      {:error,
+       {Cldr.UnknownInformationError, "No information available for :\\"155\\""}}
+
   """
   @doc since: "1.0.0"
   @spec info(atom() | String.t() | LanguageTag.t()) :: {:ok, map()} | {:error, {module(), String.t()}}
@@ -671,7 +675,9 @@ defmodule Cldr.Territory do
     case Cldr.validate_territory(territory_code) do
       {:error, reason} -> {:error, reason}
 
-      {:ok, code}      -> {:ok, @territory_info[code]}
+      {:ok, code}      ->
+        info = @territory_info[code]
+        if info, do: {:ok, info}, else: {:error, {Cldr.UnknownInformationError, "No information available for #{inspect code}"}}
     end
   end