remove printStackTrace which snuck in to test
diff --git a/brooklyn-server/core/src/test/java/org/apache/brooklyn/core/config/ConfigKeyConstraintTest.java b/brooklyn-server/core/src/test/java/org/apache/brooklyn/core/config/ConfigKeyConstraintTest.java
index 93b0731..46710fb 100644
--- a/brooklyn-server/core/src/test/java/org/apache/brooklyn/core/config/ConfigKeyConstraintTest.java
+++ b/brooklyn-server/core/src/test/java/org/apache/brooklyn/core/config/ConfigKeyConstraintTest.java
@@ -308,7 +308,6 @@
             ConfigConstraints.assertValid(child);
             fail("Expected exception when managing entity with incorrect config; instead passed assertion and got: "+value);
         } catch (Exception e) {
-            e.printStackTrace();
             Asserts.expectedFailureOfType(e, ConstraintViolationException.class);
         }
     }