TT#71908 increase wait timeout when rendering invoicepdf

Change-Id: I6de865819a96d432bfb231c9bd19a2d309b32d2f
(cherry picked from commit 312d9e7534)

lib/NGCP/Panel/Model/DB.pm

@@ -20,6 +20,17 @@ sub set_transaction_isolation {
     );
 }
 
+sub set_wait_timeout {
+    my ($self,$timeout) = @_;
+    return $self->storage->dbh_do(
+        sub {
+          my ($storage, $dbh, @args) = @_;
+          $dbh->do("SET SESSION wait_timeout = " . $args[0]);
+        },
+        $timeout,
+    );
+}
+
 1;
 
 __END__

lib/NGCP/Panel/Utils/Invoice.pm

@@ -53,6 +53,7 @@ sub create_invoice{
     my $invoice;
 
     my $schema = $c->model('DB');
+    $schema->set_wait_timeout(1800);
     #this has to be refactored  - select a contract balance instead of a "period"
     my $balance = NGCP::Panel::Utils::ProfilePackages::get_contract_balance(
         c => $c,