Sum up TotalLoad over all CPUs and divide it by number of threads

On uncommon system configurations (number of sockets > 1) the TotalLoad
perfdata of Invoke-IcingaCheckCpu was to high due to it being just
summed up over all sockets.

This patch changes this computation, the load weighted by the number
of sockets is summed up and then divided by the total number of CPUs.

Author: Lorenz Kästle

lib/provider/assets/cpu/Get-IcingaProviderDataValuesCpu.psm1

@@ -47,14 +47,16 @@ function Get-IcingaProviderDataValuesCpu()
 
     foreach ($entry in $SocketList.Keys) {
         $SocketList[$entry].TotalLoad = $SocketList[$entry].TotalLoad / $SocketList[$entry].ThreadCount;
-        $TotalCpuLoad                += $SocketList[$entry].TotalLoad;
+        $TotalCpuLoad                += $SocketList[$entry].TotalLoad * $SocketList[$entry].ThreadCount;
         $TotalCpuThreads             += $SocketList[$entry].ThreadCount;
 
         $CpuData.Metadata.Sockets        | Add-Member -MemberType NoteProperty -Name $entry    -Value (New-Object PSCustomObject);
         $CpuData.Metadata.Sockets.$entry | Add-Member -MemberType NoteProperty -Name 'Threads' -Value $SocketList[$entry].ThreadCount;
         $CpuData.Metrics.$entry          | Add-Member -MemberType NoteProperty -Name 'Total'   -Value $SocketList[$entry].TotalLoad;
     }
 
+	$TotalCpuLoad /= $TotalCpuThreads;
+
     $CpuData.Metadata | Add-Member -MemberType NoteProperty -Name 'TotalLoad'    -Value $TotalCpuLoad;
     $CpuData.Metadata | Add-Member -MemberType NoteProperty -Name 'TotalThreads' -Value $TotalCpuThreads;
     $CpuData.Metadata | Add-Member -MemberType NoteProperty -Name 'CoreDigits'   -Value ([string]$TotalCpuThreads).Length;