log root cause exception, when a service can't be configured

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1087202 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/dependencymanager/runtime/src/main/java/org/apache/felix/dm/runtime/FactorySet.java b/dependencymanager/runtime/src/main/java/org/apache/felix/dm/runtime/FactorySet.java
index f43e969..5a19a24 100644
--- a/dependencymanager/runtime/src/main/java/org/apache/felix/dm/runtime/FactorySet.java
+++ b/dependencymanager/runtime/src/main/java/org/apache/felix/dm/runtime/FactorySet.java
@@ -513,7 +513,7 @@
             else
             {
                 throw new RuntimeException("Could not invoke method " + configure
-                                           + " on object " + impl);
+                                           + " on object " + impl, t);
             }
         }
     }