Merge pull request #520 from magento-folks/bugs

[Folks] Bugs
- MAGETWO-58334 [Github] Free shipping is not applied if cart price rule match #6584
- MAGETWO-57278 For Dutch locale, ZIP in checkout is already giving out a "validation failed" error at page load
- MAGETWO-57675 [GITHUB] WYSIWYG editor does not show. #6222 #4828 #6815
- MAGETWO-56836 [FT] Update wishlist button doesn't receive the click in AddProductsToCartFromCustomerWishlistOnFrontendTest
- MAGETWO-54412 [MERCHANT] Integrity Constraint Violation when creating orders #4580
- MAGETWO-58730 [Github] Incorrect province code sent on Checkout to UPS #6564