Custom rule options overwriting defaults between test assertions

[bgriffith]

Currently custom rule options are overwriting the defaults for any assertions that follow.

See example below.

The defaults:

...
'defaults': {
    'allow-element-with-attribute': false,
    'allow-element-with-class': false,
    'allow-element-with-id': false
  },
...

First assertion will correctly allow elements with attributes.

  it('[attribute: true, class: false, id: false]', function (done) {
    lint.test(file, {
      'no-qualifying-elements': [
        1,
        {
          'allow-element-with-attribute': true
        }
      ]
    }, function (data) {
      lint.assert.equal(2, data.warningCount);
      done();
    });
  });

Second assert takes defaults to be

...
'defaults': {
    'allow-element-with-attribute': true,
    'allow-element-with-class': false,
    'allow-element-with-id': false
  },
...

Therefore second assertion will incorrectly allow elements for both attribute and class

  it('[attribute: false, class: true, id: false]', function (done) {
    lint.test(file, {
      'no-qualifying-elements': [
        1,
        {
          'allow-element-with-class': true
        }
      ]
    }, function (data) {
      lint.assert.equal(2, data.warningCount);
      done();
    });
  });