[AccompanyingPeriod] create constraints for location

src/Bundle/ChillPersonBundle/Validator/Constraints/AccompanyingPeriod/LocationValidity.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Chill\PersonBundle\Validator\Constraints\AccompanyingPeriod;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ */
+class LocationValidity extends Constraint
+{
+    public $messagePersonLocatedMustBeAssociated = "The person where the course is located must be associated to the course. Change course's location before removing the person.";
+
+    public $messagPeriodMustRemainsLocated = "The period must remains located";
+
+    public function getTargets()
+    {
+        return self::CLASS_CONSTRAINT;
+    }
+}