Jenkins refresh

Change the jenkins node label from 'docker'
to 'stage_2' as part of the Jenkins cleanup

Change-Id: Ida8ffa0f41c2467f0ac2a9f67cd326b4d9188ea3
Signed-off-by: Mark Beierl <mark.beierl@canonical.com>
diff --git a/Jenkinsfile b/Jenkinsfile
index 8140c68..b7f84cb 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -31,7 +31,7 @@
     }
 }
 
-node('docker') {
+node('stage_2') {
     checkout scm
     devops_checkout()