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

added the domain_parameter_test and group_parameter_test, modified the ensure_not_used_by in subnet model, almost finished the domain test and started the subnet test.

specified recipient tests

first host_mailer tests to complete

modified the Ensure_not_use_by in Domain model, started the Domain test, and corrected some minor issues in Auth_source_ldap test