MT#21871 setting the allowed_ips via api and panel corrupts the db

+there are different implementations of obtaining a
 fresh id from voip_aig_sequence for panel and api
+api call fails, when there are more than one id's
 in that table. which can happen after concurrently
 using the panel UI for that.

+now modified to always use mysql's autoincrement,
 otherwise api will stop working again, once it
 filled up id gaps coming from panel usage.

Change-Id: I9c699e19f7161e744ae858e75089b333cbc2b128

lib/NGCP/Panel/Role/API/Preferences.pm

@@ -645,27 +645,23 @@ sub update_item {
                 /^(man_)?allowed_ips$/ && do {
                     my $pref_name = $pref . "_grp";
                     my $aig_rs;
-                    my $seq;
+                    my $aig_group_id;
                     my $rs = $self->get_preference_rs($c, $type, $elem, $pref_name);
                     if($rs->first) {
+                        $aig_group_id = $rs->first->value;
                         $aig_rs = $c->model('DB')->resultset('voip_allowed_ip_groups')->search({
-                            group_id => $rs->first->value
+                            group_id => $aig_group_id
                         });
                         $aig_rs->delete;
                     } else {
-                        my $aig_seq = $c->model('DB')->resultset('voip_aig_sequence')->search({},{
-                            for => 'update',
-                        });
-                        unless($aig_seq->first) {
-                            $seq = 1;
-                            $aig_seq->create({ id => $seq });
-                        } else {
-                            $seq = $aig_seq->first->id + 1;
-                            $aig_seq->first->update({ id => $seq });
-                        }
+                        my $new_group = $c->model('DB')->resultset('voip_aig_sequence')->create({});
+                        $aig_group_id = $new_group->id;
                         $aig_rs = $c->model('DB')->resultset('voip_allowed_ip_groups')->search({
-                            group_id => $seq
+                            group_id => $aig_group_id
                         });
+                        $c->model('DB')->resultset('voip_aig_sequence')->search_rs({
+                                id => { '<' => $aig_group_id },
+                            })->delete_all;
                     }
                     foreach my $ip(@{ $resource->{$pref} }) {
                         unless($self->validate_ipnet($c, $pref, $ip)) {
@@ -675,8 +671,9 @@ sub update_item {
                         $aig_rs->create({ ipnet => $ip });
                     }
                     unless($rs->first) {
-                        $rs->create({ value => $seq });
+                        $rs->create({ value => $aig_group_id });
                     }
+                    # in contrast to panel, it does not drop the allowed_ips_grp pref, if empty ipnets.
                     last SWITCH;
                 };
                 # default