Merge pull request #445 from magento-dragons/092016-pr-2.2

Fixed issues:
 - MAGETWO-57868: Search fails with an error when used user-defined price attribute as searchable - for mainline
 - MAGETWO-57924: Unable to add "Customer Group Price"
 - MAGETWO-55341: Request to ESI doesn't return any data
 - MAGETWO-57892: L4 Plan fails on mainline branch
 - MAGETWO-56150: Order comments history shows time of comment twice
 - MAGETWO-57933: Product quantity is not updated on 'cart/configure' page second time
 - MAGETWO-53041: 'Yes/No' attribute shown in Advanced Search result even it not used in filtration
 - MAGETWO-52926: Impossible to find product on Store Front with name like lowerCamelCaseNumber