Accept None as value of slave.user
Change-Id: I79ccdb44d85b803c29c6b1ca157862449e480593
diff --git a/jenkins/files/slave/default b/jenkins/files/slave/default
index 7bfbade..cbd0065 100644
--- a/jenkins/files/slave/default
+++ b/jenkins/files/slave/default
@@ -26,7 +26,7 @@
# jenkins /run location
JENKINS_RUN=/var/run/jenkins
-{%- if slave.user is defined %}
+{%- if slave.get('user', None) %}
# Authentication to jenkins master
JENKINS_LOGIN="{{ slave.user.name }}"
JENKINS_PASSWORD="{{ slave.user.password }}"