The Rakefile just created rake tasks so that you could run all the specs
in a subdirectory.  However, rspec already allows you to just give the
subdirectory as an argument and does the same thing, so these rake tasks
were unecessary.

The target generation was wrong, as it created some
strange target for isolated test files.
It now creates two types of targets:

* directory targets, like:
rake integration/network/server
or
rake unit/network

Those run all tests in a specific directory

* spec targets like:
rake unit:indirector:catalog:yaml
or
rake unit:parser:ast:definition

Signed-off-by: Brice Figureau <brice-puppet@daysofwonder.com>

Signed-off-by: Brice Figureau <brice-puppet@daysofwonder.com>

of multiple.

fixing the integration tests, and extending the Classmethods
for the indirector so that indirected classes can set the
terminus class and cache class.