update stax.dtd file path

andrug

21.27.2007 958225e51eea179334ece492a903a89e5d9bf3aa

 opendj-sdk/opends/tests/functional-tests/testcases/plugins/plugins.xml

@@ -1,5 +1,5 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE stax SYSTEM "../../shared/stax.dtd">
<!DOCTYPE stax SYSTEM "../../../shared/stax.dtd">
<!--
 ! CDDL HEADER START
 !