illiad connection

[mzelesky]

Related to #187.

[sandbergja]

One thought occurs to me. If we inject the dependency on TinyTds::Client via the initializer, rather than hardcoding the TinyTds::Client class name within the initialize method, it will probably be simpler to pass in a mock (e.g. described_class.new(tds_client_class: MyFakeTdsClient))

Suggested change

	def initialize
	@conn = TinyTds::Client.new({ username: ILLIAD_USER, password: ILLIAD_PASS, host: ILLIAD_HOST,
	database: ILLIAD_DB })
	end
	def initialize(tds_client_class: TinyTds::Client)
	@conn = tds_client_class.new({ username: ILLIAD_USER, password: ILLIAD_PASS, host: ILLIAD_HOST,
	database: ILLIAD_DB })
	end