return a list, not a string, for multi-valued attributes

lib/AccountManager/Account.pm

@@ -138,16 +138,14 @@ sub eduPersonAffiliation {
     my ($self) = @_;
     my $affiliations = $affiliation{$self->profile()} || [];
 
-    return join(', ', @$affiliations);
+    return @$affiliations;
 }
 
 sub eduPersonScopedAffiliation {
     my ($self) = @_;
     my $affiliations = $scopedAffiliation{$self->profile()} || [];
 
-    $affiliations = [ map { $_ . '@' . $self->{scope} } @$affiliations ];
-
-    return join(', ', @$affiliations);
+    return map { $_ . '@' . $self->{scope} } @$affiliations;
 }
 
 sub eduPersonPrincipalName {