Add racktables::server chefspec.
Add racktables::source chefspec.
Add racktables::application chefspec.
Add racktables::database chefspec.
Remove './' from chefspec require_relative imports
Add racktables::ldap chefspec

Change ldap recipe to delay notifying apache restart.
Remove mysql dependency, as depended by database
Move source url back to attributes.

Clean up source recipe to use shorter variable namespace.
Remove 'at_exit' from coverage call, since in lib.

'start!' already wraps 'Coverage::report!' with at_exit in ChefSpec.
Update README, fixing attribute lists.