MQE-1172: Bump MFTF version and deliver Magento branches

- MFTF version bump to use MQE-1181 (release candidate branch)
- RoboFile returning exit code correctly

Author: KevinBKozan

composer.json

@@ -80,8 +80,14 @@
         "zendframework/zend-validator": "^2.6.0",
         "zendframework/zend-view": "~2.10.0"
     },
+    "repositories": [
+        {
+            "type": "git",
+            "url": "git@github.com:magento/magento2-functional-testing-framework.git"
+        }
+    ],
     "require-dev": {
-        "magento/magento2-functional-testing-framework": "2.3.3",
+        "magento/magento2-functional-testing-framework": "dev-develop",
         "friendsofphp/php-cs-fixer": "~2.12.0",
         "lusitanian/oauth": "~0.8.10",
         "pdepend/pdepend": "2.5.2",