mock(FileUtils).rm does not remove the file

[Christian Haase]

The mocks in (at least) it "cleans up if exporting into an existing dir" in systemd_spec.rb causing the files not to be deleted. It seems RR does not support a pendant of rspecs and_call_original.

This seemed to work in previous cases, but it took me a while to identify. In two cases this made problems:

• https://github.com/krissi/foreman/blob/instantiate-systemd-services/lib/foreman/export/systemd.rb#L31
• https://github.com/krissi/foreman/blob/instantiate-systemd-services/lib/foreman/export/base.rb#L106 I would have been used FileUtils.rmdir instead of #rm_r to not delete foreign files by accident.

I think this does not need to be solved immediately and can wait until e.g. rspec is upgraded to 3 something.

[David Dollar]

I have no plans to upgrade the testing infrastructure in foreman so I'd happily accept a PR to fix this.