TT#71871 - Fix /api/bannedusers arbitrary result

* Change condition that was defaulting to
	   one banned user in case of looking by
	   a non-existent id; it now returns empty
	   array which is causing the correct
	   'entity not found' error

Change-Id: Id3191ae78e7804fb62420bf15b292207c087234d

lib/NGCP/Panel/Utils/Security.pm

@@ -80,7 +80,16 @@ EOF
     }
     my $config_failed_auth_attempts = $c->config->{security}->{failed_auth_attempts} // 3;
     #in case we requested to filter by username, we will use it as the only possible key
-    for my $key ( ( defined $params{id} && exists $usr->{$params{id}}) ? ( $params{id} ) : (keys %{ $usr }) ) {
+    my @user_ids;
+    if (defined $params{id}) {
+        if (exists $usr->{$params{id}}) {
+            @user_ids = ($params{id});
+        }
+    }
+    else {
+        @user_ids = (keys %{ $usr });
+    }
+    for my $key (@user_ids) {
         my $last_auth = $usr->{$key}->{last_auth} ? NGCP::Panel::Utils::DateTime::epoch_local($usr->{$key}->{last_auth}) : undef;
         if ($last_auth) {
             $last_auth->set_time_zone($c->session->{user_tz}) if $c->session->{user_tz};