Proper Composer Definition for Running MTFT Tests

- Added autoload-dev section for being able to execute tests via composer script
- Added composer script for static code analysis
- Added composer script for tests
- Changed Travis pipeline to run composer scripts
- Changed Codeception dependency to point to the most recent patch release
- Updated composer.lock to reflect dependencies installed in PHP7.0, not via PHP7.1

Author: IvanChepurnyi

.travis.yml

@@ -4,4 +4,5 @@ php:
   - 7.1
 install: composer install --no-interaction --prefer-source
 script:
-  - vendor/bin/phpcs ./src --standard=./dev/tests/static/Magento
+  - composer code-style
+  - composer tests

composer.json

@@ -5,7 +5,7 @@
     "keywords": ["magento", "automation", "functional", "testing"],
     "require": {
         "php": "~7.0",
-        "codeception/codeception": "2.2|2.3",
+        "codeception/codeception": "^2.2|^2.3",
         "flow/jsonpath": ">0.2",
         "fzaninotto/faker": "^1.6",
         "mustache/mustache": "~2.5"
@@ -20,6 +20,15 @@
             "Magento\\FunctionalTestingFramework\\": ["src/Magento/FunctionalTestingFramework"]
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "tests\\unit\\": ["dev/tests/unit"]
+        }
+    },
+    "scripts": {
+        "tests": "vendor/bin/phpunit -c dev/tests/phpunit.xml",
+        "code-style": "vendor/bin/phpcs ./src --standard=./dev/tests/static/Magento"
+    },
     "extra": {
         "hooks": {
             "pre-push": "bin/copyright-check"