Merge pull request #1851 from magento-engcom/2.2-develop-prs

Public Pull Requests
 - magento/magento2#11563 Add price calculation improvement for product option value price by @marinagociu
 - magento-engcom#1024 [Backport] magento/magento2#10734: Magento 2 is not showing Popular Search Terms by @p-bystritsky
 - magento-engcom#1023 magento/magento2#12667: Incorrect partial attribute (EAV) reindex (Update by Schedule) for configurable product with childs visibility "Not Visible Individually" by @RomaKis
 - magento-engcom#1017 magento/magento2#12084: Product csv import > fail on round brackets in image filename by @p-bystritsky
 - magento-engcom#1021 magento/magento2#12656: Checkout: Whitespace in front of coupon code causes "Coupon code is not valid" by @RomaKis
 - magento/magento2#12666 Fix incorrect DHL Product codes by @gwharton

Fixed Public Issues
 - magento/magento2#5774 Tier price and custom options give bad results
 - magento/magento2#10743 Magento 2 is not showing Popular Search Terms
 - magento/magento2#12667 Incorrect partial attribute (EAV) reindex (Update by Schedule) for configurable product with childs visibility "Not Visible Individually"
 - magento/magento2#12084 Product csv import > fail on round brackets in image filename
 - magento/magento2#12656 Checkout: Whitespace in front of coupon code causes "Coupon code is not valid"