added some more tests, but update is not passing.

a bit of refactoring

fixed all tests, but it seems not to be a show action, that test is commented.

added the host_parameter_test, modified the Ensure_not_use_by issue in the subnet model and almost finished the subnet_test

fixed create and update tests

reviewing auth_sources and architectures controller tests. They are both very broken.

removed old architecture_controller_test file

modified the name of architectures_controller_test.rb

added some more tests to HostMailer

Added test logging support