Add a couple of Node methods to approved list

  - method hudson.model.Node getLabelString
  - method hudson.model.Node getNodeName

Change-Id: Iea73f93d49ee35ea053d11361764a93891bffba5
diff --git a/jenkins/client/approved_scripts.yml b/jenkins/client/approved_scripts.yml
index 8586e49..4f12bd6 100644
--- a/jenkins/client/approved_scripts.yml
+++ b/jenkins/client/approved_scripts.yml
@@ -24,6 +24,8 @@
         - method hudson.model.Job getBuildByNumber int
         - method hudson.model.Job getBuilds
         - method hudson.model.Job getLastBuild
+        - method hudson.model.Node getLabelString
+        - method hudson.model.Node getNodeName
         - method hudson.model.Run getEnvironment
         - method hudson.model.Run getId
         - method hudson.model.Run getNumber