provide default value for cluster check critical
provide default value for cluster check critical

jaxxstorm/puppet-monitoring_check,Yelp/puppet-monitoring_check,keymone/puppet-monitoring_check,somic/puppet-monitoring_check,keymone/puppet-monitoring_check,jglukasik/puppet-monitoring_check,jglukasik/puppet-monitoring_check,jaxxstorm/puppet-monitoring_check,Yelp/puppet-monitoring_check,somic/puppet-monitoring_check