fix unit test

Author: timidri

spec/classes/dashboards/puppet_metrics_spec.rb

@@ -72,8 +72,8 @@ class {'puppet_metrics_dashboard':
         )
       end
 
-      it 'should contain Grafana_dashboard[Archive Process/System Stats]' do
-        is_expected.to contain_grafana_dashboard('Archive Process/System Stats').with(
+      it 'should contain Grafana_dashboard[Archive Process-System Stats]' do
+        is_expected.to contain_grafana_dashboard('Archive Process-System Stats').with(
           grafana_url: 'http://localhost:3000',
           grafana_user: 'admin',
           grafana_password: 'puppetlabs',