MT#56693 sound files loopplay change to optional

* /api/soundfiles loopplay field is now optional and defaults to 0

Change-Id: I3af379663d29c1c51f039fe3751bb01b661e233a

lib/NGCP/Panel/Form/Sound/FileAPI.pm

@@ -11,7 +11,8 @@ has_field 'submitid' => ( type => 'Hidden' );
 
 has_field 'loopplay' => (
     type => 'Boolean',
-    required => 1,
+    required => 0,
+    default => 0,
     element_attr => {
         rel => ['tooltip'],
         title => ['Play file in a loop.'],