Update rspec-system tests for rspec-system-puppet 1.5

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #199 from kbarber/rspec-system-15

Update rspec-system tests for rspec-system-puppet 1.5
Update tests for rspec-system-puppet 2

This changes all the tests to be not only compatible with rspec-system-puppet
2, but to use some of the new syntactic sugar it provides.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #209 from kbarber/rspec-system-puppet-2

Update tests for rspec-system-puppet 2