Improved setting error messages to jenkins job descriptions

Change-Id: Ia19224b7334d6fd468ecc40be87d5b4df795adc5
diff --git a/test-salt-model-node.groovy b/test-salt-model-node.groovy
index 890630f..bcc0c8b 100644
--- a/test-salt-model-node.groovy
+++ b/test-salt-model-node.groovy
@@ -60,7 +60,7 @@
   } catch (Throwable e) {
      // If there was an error or exception thrown, the build failed
      currentBuild.result = "FAILURE"
-     currentBuild.description = e.message
+     currentBuild.description = currentBuild.description ? e.message + " " + currentBuild.description : e.message
      throw e
   }
 }