update spec with relative pathing

Author: jplindquist

spec/unit/puppet/provider/vcsrepo/git_spec.rb

@@ -764,7 +764,7 @@ def branch_a_list(include_branch = nil?)
         expect(provider).to receive(:update_remotes)
         expect(provider).to receive(:exec_git).with('--version').and_return('1.8.3.1')
         expect(provider).to receive(:exec_git).with('config', '--local', '--bool', 'core.sparseCheckout', 'true')
-        expect(File).to receive(:open).with(File.join(resource.value(:path), '.git/info/sparse-checkout'), 'w').and_yield(sparse_checkout_file)
+        expect(File).to receive(:open).with('.git/info/sparse-checkout', 'w').and_yield(sparse_checkout_file)
         resource.value(:includes).each do |inc|
           expect(sparse_checkout_file).to receive(:puts).with(inc)
         end