Add qtxmlpatterns-testsuites as submodule and get XQTS from there

Change-Id: I9dda1a76e730dfe1790fe6771a6f9ccd63c5d13b
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@theqtcompany.com>

.gitmodules

+[submodule "tests/auto/TESTSUITES"]
+	path = tests/auto/TESTSUITES
+	url = ../qtxmlpatterns-testsuites.git

tests/auto/xmlpatternsxqts/tst_xmlpatternsxqts.cpp

@@ -59,9 +59,8 @@ void tst_XmlPatternsXQTS::catalogPath(QString &write) const
     if(dontRun())
         QSKIP("This test takes too long time to run on the majority of platforms.");
 
-    write = QFINDTESTDATA("TESTSUITE/XQTSCatalog.xml");
+    write = QFINDTESTDATA("../TESTSUITES/XQTS/XQTSCatalog.xml");
     return;
-
 }
 
 QTEST_MAIN(tst_XmlPatternsXQTS)