Reduce the concurrent execution likelihood of Puppet runs

The patch removes the crontab at the begining of deployment and increase
the frequency of the cron job responsible to update Nagios.

Change-Id: I095540c36b3f0c0c318ae91702b5671e3122e8c2

deployment_scripts/puppet/manifests/hiera.pp

@@ -173,3 +173,8 @@ file { $purge:
   ensure => absent,
   backup => '.bak-version-0.10.x',
 }
+
+# Remove the crontab to avoid concurrent execution during an upgrade
+cron { 'update lma infra alerting':
+    ensure   => absent,
+}

deployment_scripts/puppet/modules/lma_infra_alerting/manifests/nagios.pp

@@ -106,7 +106,7 @@ class lma_infra_alerting::nagios (
   cron { 'update lma infra alerting':
     ensure   => present,
     command  => "/usr/bin/flock -n /tmp/lma.lock -c \"${cron_bin} lma_infrastructure_alerting ${plugin_version}\"",
-    minute   => '*',
+    minute   => '*/10',
     hour     => '*',
     month    => '*',
     monthday => '*',