Issue 4120 - Fix nagios-client / sudo dependency

modules/nagios/manifests/client.pp

 class nagios::client($server_address) {
-  package {['nagios-nrpe-server', 'tcpdump']: ensure => present}
+
+  ensure_packages([
+    'nagios-nrpe-server',
+    'sudo',
+    'tcpdump',
+  ])
 
   file {'/etc/nagios/nrpe.cfg':
     mode => 644,
     owner => root,
     group => root,
     content => template('nagios/nrpe.cfg.erb'),
     require => Package['nagios-nrpe-server'],
     notify => Service['nagios-nrpe-server']
   }
 
   service {'nagios-nrpe-server':
     ensure => running,
     enable => true,
     subscribe => File['/etc/nagios/nrpe.cfg']
   }
 
   file {'/etc/sudoers.d/nagios':
     ensure => present,
     owner => root,
     group => root,
     mode => 0440,
-    source => 'puppet:///modules/nagios/sudoers'
+    source => 'puppet:///modules/nagios/sudoers',
+    require => Package['sudo'],
   }
 
   file {'/usr/lib/nagios/plugins/check_bandwidth':
     ensure => present,
     mode => 755,
     owner => root,
     group => root,
     source => 'puppet:///modules/nagios/check_bandwidth',
     require => [
       Package['nagios-nrpe-server'],
@@ skipping 12 matching lines @@
 
   file {'/usr/lib/nagios/plugins/check_memory':
     ensure => present,
     mode => 755,
     owner => root,
     group => root,
     source => 'puppet:///modules/nagios/check_memory',
     require => Package['nagios-nrpe-server']
   }
 }