Skip Load:ReportRelative is problematic for collectd9

Refixes #901

The bug was that a ReportRelative configuration to the load
plugin for collectd 5.9.0 was causing a parse error.
It has been fixed for 5.9.1

collectd module now skips this configuration for collectd for collectd == 5.9.0
Previously it was '!=' 5.9.

* Upsteam bug for collectd: #901
* Previous incorrect commit: 8edc014

spec/acceptance/class_plugin_load_spec.rb

@@ -0,0 +1,127 @@
+require 'spec_helper_acceptance'
+
+describe 'collectd::plugin::load class' do
+  context 'basic parameters' do
+    # Using puppet_apply as a helper
+    it 'works idempotently with no errors' do
+      pp = <<-EOS
+      class{'collectd':
+        utils => true,
+      }
+      class{'collectd::plugin::load': }
+      # Add one write plugin to keep logs quiet
+      class{'collectd::plugin::csv':}
+      # Create a socket to query
+      class{'collectd::plugin::unixsock':
+        socketfile  => '/var/run/collectd-sock',
+        socketgroup => 'root',
+      }
+
+      EOS
+      # Run 3 times since the collectd_version
+      # fact is impossible until collectd is
+      # installed.
+      apply_manifest(pp, catch_failures: false)
+      apply_manifest(pp, catch_failures: true)
+      apply_manifest(pp, catch_changes: true)
+      # Wait to get some data
+      shell('sleep 10')
+    end
+
+    describe service('collectd') do
+      it { is_expected.to be_running }
+    end
+
+    describe command('collectdctl -s /var/run/collectd-sock listval') do
+      its(:exit_status) { is_expected.to eq 0 }
+      its(:stdout) { is_expected.to match %r{load/load$} }
+      its(:stdout) { is_expected.not_to match %r{load/load-relative$} }
+    end
+  end
+  context 'report relative false' do
+    # Using puppet_apply as a helper
+    it 'works idempotently with no errors' do
+      pp = <<-EOS
+      class{'collectd':
+        utils => true,
+      }
+      class{'collectd::plugin::load':
+        report_relative => false,
+      }
+      # Add one write plugin to keep logs quiet
+      class{'collectd::plugin::csv':}
+      # Create a socket to query
+      class{'collectd::plugin::unixsock':
+        socketfile  => '/var/run/collectd-sock',
+        socketgroup => 'root',
+      }
+
+      EOS
+      # Run 3 times since the collectd_version
+      # fact is impossible until collectd is
+      # installed.
+      apply_manifest(pp, catch_failures: false)
+      apply_manifest(pp, catch_failures: true)
+      apply_manifest(pp, catch_changes: true)
+      # Wait to get some data
+      shell('sleep 10')
+    end
+
+    describe service('collectd') do
+      it { is_expected.to be_running }
+    end
+
+    describe command('collectdctl -s /var/run/collectd-sock listval') do
+      its(:exit_status) { is_expected.to eq 0 }
+      its(:stdout) { is_expected.to match %r{load/load$} }
+      its(:stdout) { is_expected.not_to match %r{load/load-relative$} }
+    end
+  end
+  context 'report relative true' do
+    # Using puppet_apply as a helper
+    it 'works idempotently with no errors' do
+      pp = <<-EOS
+      class{'collectd':
+        utils => true,
+      }
+      class{'collectd::plugin::load':
+        report_relative => true,
+      }
+      # Add one write plugin to keep logs quiet
+      class{'collectd::plugin::csv':}
+      # Create a socket to query
+      class{'collectd::plugin::unixsock':
+        socketfile  => '/var/run/collectd-sock',
+        socketgroup => 'root',
+      }
+
+      EOS
+      # Run 3 times since the collectd_version
+      # fact is impossible until collectd is
+      # installed.
+      apply_manifest(pp, catch_failures: false)
+      apply_manifest(pp, catch_failures: true)
+      apply_manifest(pp, catch_changes: true)
+      # Wait to get some data
+      shell('sleep 10')
+    end
+
+    describe service('collectd') do
+      it { is_expected.to be_running }
+    end
+
+    describe command('collectdctl -s /var/run/collectd-sock listval') do
+      its(:exit_status) { is_expected.to eq 0 }
+      # https://github.com/voxpupuli/puppet-collectd/issues/901
+      # following will fail once 5.9.1 is released in EPEL8
+      if fact('osfamily') == 'RedHat' && fact('os.release.major') == '8' ||
+         fact('osfamily') == 'Debian' && fact('os.release.major') == '8'
+        its(:stdout) { is_expected.not_to match %r{load/load-relative$} }
+        its(:stdout) { is_expected.to match %r{load/load$} }
+      else
+        its(:stdout) { is_expected.to match %r{load/load-relative$} }
+        its(:stdout) { is_expected.not_to match %r{load/load$} }
+      end
+    end
+  end
+end

templates/plugin/load.conf.erb

@@ -1,6 +1,9 @@
 <% if scope.lookupvar('collectd::collectd_version_real') and (scope.function_versioncmp([scope.lookupvar('collectd::collectd_version_real'), '5.5']) >= 0) -%>
 <Plugin load>
-<% if scope.lookupvar('collectd::collectd_version_real') and (scope.function_versioncmp([scope.lookupvar('collectd::collectd_version_real'), '5.9']) == 0) -%>
+<% if scope.lookupvar('collectd::collectd_version_real') and (scope.function_versioncmp([scope.lookupvar('collectd::collectd_version_real'), '5.9.0']) == 0) -%>
+  # ReportRelative is broken with collectd 5.9.0
+  # https://github.com/collectd/collectd/issues/3180
+<% else -%>
   ReportRelative <%= @report_relative %>
 <% end -%>
 </Plugin>