[libvirt] Changed the computation of memory utilization: avoid of using as the total memory the value returned by the getDomainGetInfo API (field 'maxMem'). Furthermore, if the 'meminfo server' is available and the field 'MemTotal' is present, use this information instead of the less precise information provided by the getDomainGetInfo API (field 'memory'); otherwise, use value returned by the getDomainGetInfo API (field 'memory')
[libvirt] Changed the computation of memory utilization: avoid of using as the total memory the value returned by the getDomainGetInfo API (field 'maxMem'). Furthermore, if the 'meminfo server' is available and the field 'MemTotal' is present, use this information instead of the less precise information provided by the getDomainGetInfo API (field 'memory'); otherwise, use value returned by the getDomainGetInfo API (field 'memory')

sguazt/prometheus,sguazt/dcsxx-testbed,sguazt/prometheus,sguazt/prometheus