Extend topology info extracted by ReFrame

[mahendrapaipuri]

The current topology info extracted by ReFrame can be extended further to include

• Memory info (Linux commands like free or psutil)
• Network adapter info (From /sys/class/net which includes both tcp and infiniband adapters info)

Potential use cases can be to adapt HPL input config files which need available memory info, to estimate interconnect line rates from IMB PinPong benchmarks.