Bug 15565: (QA follow-up) Add atomic update

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>

installer/data/mysql/atomicupdate/bug_15565.pl

@@ -0,0 +1,19 @@
+use Modern::Perl;
+
+return {
+    bug_number  => "15565",
+    description => "Add DisplayMultiItemHolds system preference",
+    up          => sub {
+        my ($args) = @_;
+        my ( $dbh, $out ) = @$args{qw(dbh out)};
+
+        $dbh->do(
+            q{
+            INSERT IGNORE INTO systempreferences ( `variable`, `value`, `options`, `explanation`, `type` ) VALUES
+            ('DisplayMultiItemHolds','0','','Display the ability to place holds on different items at the same time in staff interface and OPAC','YesNo')
+        }
+        );
+
+        say $out "Added new system preference 'DisplayMultiItemHolds'";
+    }
+};