update stax.dtd file path

andrug

21.45.2007 9cc2d2ee0e65dcebe6099e4f22f7497ae3685f4f

 opendj-sdk/opends/tests/stress-tests/testcases/quickstart/quickstart.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
 !