MQE-237:[Generator] Add before and after logic to suites

- add new before/after tags
- add new Group generator class
- add verification test for new suite logic
- update existing suite sample file

Author: imeron2433

composer.json

@@ -7,7 +7,8 @@
         "php": "~7.0",
         "codeception/codeception": "2.2|2.3",
         "flow/jsonpath": ">0.2",
-        "fzaninotto/faker": "^1.6"
+        "fzaninotto/faker": "^1.6",
+        "mustache/mustache": "~2.5"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "1.5.3",