Adding change_port_speed and unit tests for virtual guests and hardware
Moved the test directory to be called 'spec' and reexamined the spec task in the rakefile
Adopted rspec and rake changes from master
Continued work moving test files into spec directory
Added unit tests for the change_port_speed mechanism and set up shared tests for virtual and bare metal server
DRY up the code that loads fixtures by moving that functionality into a helper.  Remove the unused config_file_spec.
Add more test cases to the shared examples for servers.