Add a missing resource dependency.

Editing /etc/sysconfig/rsyslog needs to require the rsyslog package.
Things have worked in practice anyway, since rsyslog is installed by
default in both EL-6 and EL-7, but we should properly declare our
dependencies.

manifests/central_server.pp

@@ -20,6 +20,7 @@ class syslog::central_server(
 		    subsystem => 'rsyslog',
 		    setting => 'SYSLOGD_OPTIONS',
 		    value => '"-c5"',
+		    require => Package['rsyslog'],
 		    notify => Service['rsyslog'];
 	    }
 	    file {
@@ -37,6 +38,7 @@ class syslog::central_server(
 		    subsystem => 'rsyslog',
 		    setting => 'SYSLOGD_OPTIONS',
 		    value => '""',
+		    require => Package['rsyslog'],
 		    notify => Service['rsyslog'];
 	    }
 	    file {