Add configurable timeout for jjb update

It was hardcoded to 600, add the ability to configure
depending on needs.

Change-Id: Ia23f32615412c88a292f9c59ec2c5ed25e46646c

manifests/job_builder.pp

@@ -7,6 +7,7 @@ class jenkins::job_builder (
   $git_revision = 'master',
   $git_url = 'https://git.openstack.org/openstack-infra/jenkins-job-builder',
   $config_dir = '',
+  $jenkins_jobs_update_timeout = '600',
 ) {
 
   # A lot of things need yaml, be conservative requiring this package to avoid
@@ -56,7 +57,7 @@ class jenkins::job_builder (
 
   exec { 'jenkins_jobs_update':
     command     => 'jenkins-jobs update --delete-old /etc/jenkins_jobs/config',
-    timeout     => '600',
+    timeout     => $jenkins_jobs_update_timeout,
     path        => '/bin:/usr/bin:/usr/local/bin',
     refreshonly => true,
     require     => [