Fix aggregateRating schema on product page

[rodriciru]

Questions	Answers
Description?	Add aggregaterating to schema.org markup
Type?	improvement

[rodriciru]

Also, i can't find any implementation of the first if, so maybe it can be deleted
{if isset($nbComments) && $nbComments && $ratings.avg}"aggregateRating": { "@type": "AggregateRating", "ratingValue": "{$ratings.avg|round:1|escape:'html':'UTF-8'}", "reviewCount": "{$nbComments|escape:'html':'UTF-8'}" }

[rodriciru]

Also, will be great to add the reviews to the schema, but as far I can see the module productcomments doesn't provide that info

[NeOMakinG]

@rodriciru Please, could you make some efforts on filling the PR description? Sometimes we're pretty free not serving it for some apparent things or whatever, but we need some input here

I'll approve afterwhile

[rodriciru]

Sorry!
I think it will be self-explanatory

[rodriciru]

Im working on add review to schema, but I have some problems
My PR regarding that :
PrestaShop/productcomments#140

I try to do in theme files but google complains about it because we can't link the product schema with the microdata or json+ld on .tpl (Really you can (@id or itemref) but it still complains because on product schema there's no direct ref to the reviews.
So the best option is adding to the module

[NeOMakinG]

@rodriciru I guess we can at least merge this one? And add reviews inside another PR?