`ServicePattern` pollutes the top-level namespace

[ollietreend]

The ServicePattern module is defined as a top-level module, rather than being namespaced within the DfE::Analytics module. It therefore pollutes the top-level namespace of any Ruby app which uses the dfe-analytics gem.

dfe-analytics/lib/dfe/analytics/shared/service_pattern.rb

Lines 1 to 8 in 3e078f9

	# a template for creating service objects
	module ServicePattern
	def self.included(base)
	base.extend(ClassMethods)
	base.class_eval do
	private_class_method(:new)
	end
	end

For example, this caused some strange behaviour over in DFE-Digital/itt-mentor-services#521 (comment) where we had to manually require our own ServicePattern module directly in a spec file to override the one provided by dfe-analytics.

I think ideally this module should be namespaced inside DfE::Analytics to avoid this from happening – plus to be consistent with the other classes in this gem, which all seem to be namespaced according to their file path.

In other words, I think lib/dfe/analytics/shared/service_pattern.rb should be changed to:

# a template for creating service objects
module DfE
  module Analytics
    module Shared
      module ServicePattern
        # ...
      end
    end
  end
end