Revert "Clean up include_class deprecation notice"

If the deprecated `include_class` is used with rspec-2.99, #245 occurs.
#### Commit message of the fix
This reverts commit 8d951da86be5e61e17fec4491cb2990b8efb590b.

The RSpec-core commit c07c4cf9b47b9f58b222b77ca13daea11b3d7585
(included in 2.99.0) has changed the deprecation api:
```
    - def deprecate(deprecated, replacement_or_hash={}, ignore_version=nil)
    - data = Hash === replacement_or_hash
                        ? replacement_or_hash
                        : { :replacement => replacement_or_hash }
    + def deprecate(deprecated, data = {})
```
The commit that has been reverted changed the second parameter from
    `replacement: foo`
to
    `foo`
which is incompatible with the new form, so it has to be reverted.

Now it works with 2.X again.

Conflicts:
    lib/rspec-puppet/matchers/include_class.rb
        context conflict

The tests have also been adjusted accordingly