Merge remote-tracking branch 'origin/MAGETWO-41762-update-to-php7' into PR_Branch

Author: mazhalai

composer.json

@@ -8,7 +8,7 @@
     "AFL-3.0"
   ],
   "require": {
-    "php": "~5.5.0|~5.6.0",
+    "php": "~5.5.0|~5.6.0|~7.0.0",
     "composer/composer": "1.0.0-alpha10",
     "symfony/console": "~2.3 <2.7"
   },