Merge remote-tracking branch 'origin/MAGETWO-80622' into PR2.2_20171115

Author: slavvka

dev/tests/functional/composer.json

@@ -1,6 +1,6 @@
 {
     "require": {
-        "magento/mtf": "1.0.0-rc56",
+        "magento/mtf": "1.0.0-rc57",
         "php": "7.0.2|~7.0.6|~7.1.0",
         "phpunit/phpunit": "~4.8.0|~5.5.0",
         "phpunit/phpunit-selenium": ">=1.2"