Swatches does not work properly into Catalogsearch

[romainruaud]

Steps to reproduce :

• Pick an attribute based on swatches (ie. "color" on Magento with sample datas).
• Set "Use in Search Results Layered Navigation" to "Yes".
• Go to catalogsearch result page.

=> The swatches are appearing on the DOM, but, they are not displayed properly.

This may be due to the fact that there is no layout for catalogsearch_result_index in the swatches module.

[piotrekkaminski]

Closing in favor of PR #3638