Introduce skipSlowTests system property set by surefire
diff --git a/asterix-app/src/test/resources/runtimets/testsuite.xml b/asterix-app/src/test/resources/runtimets/testsuite.xml
index d7b4c75..3d1406e 100644
--- a/asterix-app/src/test/resources/runtimets/testsuite.xml
+++ b/asterix-app/src/test/resources/runtimets/testsuite.xml
@@ -14,7 +14,7 @@
  !-->
 <test-suite xmlns="urn:xml.testframework.asterix.ics.uci.edu" ResultOffsetPath="results" QueryOffsetPath="queries" QueryFileExtension=".aql">
   <test-group name="flwor">
-    <test-case FilePath="flwor">
+    <test-case FilePath="flwor" category="slow">
       <compilation-unit name="at00">
         <output-dir compare="Text">at00</output-dir>
       </compilation-unit>