Specify package requirements for module (#3366)

* fixed time calculation. Fixes #3331

* Added RequiresPackage interface and validation to check external package dependencies for modules

Author: DavertMik

src/Codeception/Module/AMQP.php

@@ -1,6 +1,7 @@
 <?php
 namespace Codeception\Module;
 
+use Codeception\Lib\Interfaces\RequiresPackage;
 use Codeception\Module as CodeceptionModule;
 use Codeception\Exception\ModuleException as ModuleException;
 use Codeception\TestInterface;
@@ -56,7 +57,7 @@
  * @author [email protected]
  * @author davert
  */
-class AMQP extends CodeceptionModule
+class AMQP extends CodeceptionModule implements RequiresPackage
 {
     protected $config = [
         'host'     => 'localhost',
@@ -79,6 +80,11 @@ class AMQP extends CodeceptionModule
 
     protected $requiredFields = ['host', 'username', 'password', 'vhost'];
 
+    public function _requires()
+    {
+        return ['PhpAmqpLib\Connection\AMQPStreamConnection' => '"php-amqplib/php-amqplib": "~2.4"'];
+    }
+
     public function _initialize()
     {
         $host = $this->config['host'];