UtilsArray - Refactor out uses of deprecated CRM_Utils_Array::value.

CRM/Activity/BAO/Query.php

CRM/Contact/BAO/Query.php

CRM/Contact/Form/Merge.php

CRM/Contact/Page/AJAX.php

CRM/Core/Permission.php

CRM/Event/Form/Registration/Register.php

CRM/Export/BAO/ExportProcessor.php

CRM/Utils/REST.php

CRM/Utils/VersionCheck.php