Revert Unneeded Test Change

Author: Calum Gilchrist

spec/octocatalog-diff/integration/preserve_environments_spec.rb

@@ -47,7 +47,7 @@
       end
 
       it 'should exit without error' do
-        expect(@result.exitcode).to eq(2), OctocatalogDiff::Integration.format_exception(@result)
+        expect(@result.exitcode).to eq(0), OctocatalogDiff::Integration.format_exception(@result)
         expect(@result.exception).to be_nil, OctocatalogDiff::Integration.format_exception(@result)
       end
     end