feat(EmailBundle) change required value

 * added: At least one email is required and mailTo is not required
 * Note: update the database

Author: Yansell Rivas Diaz

Entity/Email.php

@@ -54,7 +54,7 @@ class Email
     /**
      * @var string
      *
-     * @ORM\Column(name="message_to", type="string", length=255)
+     * @ORM\Column(name="message_to", type="string", length=255, nullable=true)
      */
     private $messageTo;
 

Service/Mailer.php

@@ -304,6 +304,11 @@ private function processEmail($from, $to, $cc = array(), $bcc = array(), $subjec
             $subject = "TEST - ".$subject;
         }
 
+        if(!$to && !$cc && !$bcc) {
+            $this->container->get('logger')->log(\Monolog\Logger::CRITICAL, "At least one email is required");
+            return false;
+        }
+        
         /** @var Swift_Message $message */
         $message = new \Swift_Message($subject);
         $message->setFrom($from);
@@ -322,9 +327,6 @@ private function processEmail($from, $to, $cc = array(), $bcc = array(), $subjec
             }
         } elseif($to != "" && filter_var($to, FILTER_VALIDATE_EMAIL)) {
             $message->setTo($to);
-        } else {
-            $this->container->get('logger')->log(\Monolog\Logger::CRITICAL, "Invalid recipient: ".json_encode($to));
-            return false;
         }
 
         if(is_array($bcc)) {