Item11390: EmptyPlugin manifest has changed.

The latest version of EmptyPlugin includes VarEXAMPLETAG. The Configure
tests were checking the count of files in the manifest.

git-svn-id: http://svn.foswiki.org/trunk@13514 0b4bb1d4-4e5a-0410-9cc4-b2b747904278

UnitTestContrib/test/unit/ConfigureTests.pm

@@ -1845,7 +1845,7 @@ qr#Unable to find EmptyPlugin locally in (.*) ...fetching installer from http://
 
     my @files = $pkg->listFiles();
     $this->assert_num_equals(
-        3,
+        4,
         scalar @files,
         "Unexpected number of files in EmptyPlugin manifest"
     );