Update products quantity by sku

PUT {{baseUrl}}/products/quantitybysku

First this service tries to update product option's quantity by sku, if the option does not exist, then it tries to update product's quantity by sku.
Service urls:
http://yourdomain.com/api/rest_admin/products/quantitybysku
OR
http://yourdomain.com/index.php?route=rest/product_admin/productquantitybysku

[{"sku"=>"<string>", "quantity"=>"<integer>"}, {"sku"=>"<string>", "quantity"=>"<integer>"}]

Key	Datatype	Required	Description
`Content-Type`	string

status: OK

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