reverting build-ami config.xml

playbooks/roles/jenkins_admin/templates/edx/var/jenkins/jobs/build-ami/config.xml.j2

@@ -27,7 +27,7 @@
           <defaultValue></defaultValue>
         </hudson.model.TextParameterDefinition>
         <hudson.model.TextParameterDefinition>
-          <name>vars</name>
+          <name>ls</name>
           <description></description>
           <defaultValue></defaultValue>
         </hudson.model.TextParameterDefinition>
@@ -168,7 +168,7 @@ cd util/vpc-tools/
 echo "$refs" > /var/tmp/$BUILD_ID-refs.yml
 cat /var/tmp/$BUILD_ID-refs.yml
 
-echo {{ vars }}> /var/tmp/$BUILD_ID-extra-vars.yml
+echo "$vars"> /var/tmp/$BUILD_ID-extra-vars.yml
 cat /var/tmp/$BUILD_ID-extra-vars.yml
 
 python -u abbey.py -p $play -t c1.medium  -d $deployment -e $environment -i /edx/var/jenkins/.ssh/id_rsa -b $base_ami --vars /var/tmp/$BUILD_ID-extra-vars.yml --refs /var/tmp/$BUILD_ID-refs.yml -c $BUILD_NUMBER --configuration-version $configuration --configuration-secure-version $configuration_secure -k {{ JENKINS_ADMIN_EC2_KEY }} --configuration-secure-repo &quot;{{ JENKINS_ADMIN_CONFIGURATION_SECURE_REPO }}&quot;