minor fix to ruby test cases

Author: wing328

modules/swagger-codegen/src/main/resources/ruby/model_test.mustache

@@ -28,10 +28,11 @@ require 'date'
   describe 'test attribute "{{{name}}}"' do
     it 'should work' do
        {{#isEnum}}
-       validator = Petstore::EnumTest::EnumAttributeValidator.new('{{{datatype}}}', [{{#allowableValues}}{{#values}}"{{{this}}}"{{^-last}}, {{/-last}}{{/values}}{{/allowableValues}}])
-       validator.allowable_values.each do |value|
-         expect { @instance.{{name}} = value }.not_to raise_error
-       end
+       # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers
+       #validator = Petstore::EnumTest::EnumAttributeValidator.new('{{{datatype}}}', [{{#allowableValues}}{{#values}}"{{{this}}}"{{^-last}}, {{/-last}}{{/values}}{{/allowableValues}}])
+       #validator.allowable_values.each do |value|
+       #  expect { @instance.{{name}} = value }.not_to raise_error
+       #end
        {{/isEnum}}
        {{^isEnum}}
        # assertion here. ref: https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers