Participant & Survey - update creating instance od DateTime from string

Required to fix problem "Connection with XDebug 2.5.1 was not established. Validate installation."

.docker/config/xdebug.ini

@@ -1,7 +1,6 @@
 [xdebug]
-zend_extension='xdebug.so'
+zend_extension=xdebug.so
 
 xdebug.remote_enable=1
-xdebug.remote_connect_back=1
-xdebug.idekey='PHPSTORM'
 xdebug.remote_port=9001
+xdebug.remote_host=10.254.254.254

src/Result/Item/Participant.php

@@ -199,7 +199,12 @@ class Participant extends BaseItem
                 break;
 
             case 'completed':
-                $this->completed = 'Y' === trim(strtoupper($value));
+                if ('N' === trim(strtoupper($value))) {
+                    $this->completed = false;
+                    break;
+                }
+
+                $this->completed = Date::isValidDate($value, true);
                 break;
 
             case 'usesleft':
@@ -211,7 +216,7 @@ class Participant extends BaseItem
                     break;
                 }
 
-                $this->validFrom = Date::getDateTime($value, false, 'Y-m-d H:i:s');
+                $this->validFrom = Date::getDateTime($value, true);
                 break;
 
             case 'validuntil':
@@ -219,7 +224,7 @@ class Participant extends BaseItem
                     break;
                 }
 
-                $this->validUntil = Date::getDateTime($value, false, 'Y-m-d H:i:s');
+                $this->validUntil = Date::getDateTime($value, true);
                 break;
         }
     }

src/Result/Item/Survey.php

@@ -74,7 +74,7 @@ class Survey extends BaseItem
                     break;
                 }
 
-                $this->startsAt = Date::getDateTime($value, false, 'Y-m-d H:i:s');
+                $this->startsAt = Date::getDateTime($value, true);
                 break;
 
             case 'expires':
@@ -82,7 +82,7 @@ class Survey extends BaseItem
                     break;
                 }
 
-                $this->expiresAt = Date::getDateTime($value, false, 'Y-m-d H:i:s');
+                $this->expiresAt = Date::getDateTime($value, true);
                 break;
 
             case 'active':

tests/Result/Item/ParticipantTest.php

@@ -200,7 +200,7 @@ class ParticipantTest extends BaseTestCase
                 'sent'           => 'Y',
                 'remindersent'   => 'N',
                 'remindercount'  => 1,
-                'completed'      => 'Y',
+                'completed'      => (new DateTime())->format('Y-m-d H:i'),
                 'usesleft'       => 5,
                 'validfrom'      => (new DateTime())->format('Y-m-d H:i:s'),
                 'validuntil'     => null,