Fixed broken tests.

module/VuFind/tests/unit-tests/src/VuFindTest/ILS/Driver/DemoTest.php

@@ -57,7 +57,7 @@ class DemoTest extends \VuFindTest\Unit\TestCase
             ->disableOriginalConstructor()->getMock();
         $this->driver = new Demo(
             new \VuFind\Date\Converter(), $this->getMock('VuFindSearch\Service'),
-            $session
+            function () use ($session) { return $session; }
         );
         $this->driver->init();
     }

module/VuFind/tests/unit-tests/src/VuFindTest/ILS/Driver/MultiBackendTest.php

@@ -2511,7 +2511,7 @@ class MultiBackendTest extends \VuFindTest\Unit\TestCase
             [
                 new \VuFind\Date\Converter(),
                 $this->getMock('VuFindSearch\Service'),
-                $session
+                function () use ($session) { return $session; }
             ]
         );
     }