Added more Intel RDT capability discovery: CMT,MBM,MBA

[okartau]

Added more Intel RDT capability discovery: CMT,MBM,MBA

Added Memory Bandwith Allocation (MBA) capability discovery.
Refined RDT monitoring capability detection;
Cache Monitoring Technology (CMT) and
Memory Bandwidth Monitoring (MBM)
capabilities can be detected separately.

[okartau]

as I don't currently have suitable HW, I cant myself verify the positive code-path here, i.e. when MBA capability is detected. The logic relies on intel-cmt-cat, so if that can be trusted, the code here should work. But we may want to wait with merging until the NFD code is verified as well, just to be sure.

[balajismaniam]

@okartau Thanks for opening this PR. Like you mentioned, we should wait till we can fully test the changes e2e.

[okartau]

I added more capabilities to same PR, hope thats OK. Note that I leave already existing RDTMON but I added new labels for CMT and MBM.
RDTCMT in most cases overlaps with RDTMON, right?
So we may want to skip adding it.
But as there are separate bits returned by lcpuid(0xf,1) encoding CMT and MBM,
expressing both capabilities separately is kind of complete solution, isnt it.
I have verified this code on E5 v3 and E5v4, and it shows correctly that v3 CPU
has CMT support but no MBM support

[marquiz]

I tested this on a machine with an Intel® Xeon® Platinum 8170M processor, with the following results:

[mlehtone@sklep0 node-feature-discovery]$ docker run 5c05eef78c7b --oneshot --no-publish
...
E0524 14:18:24.268227       1 rdt.go:69] support for RDT L2 allocation was not detected: exit status 1
2018/05/24 14:18:24 node.alpha.kubernetes-incubator.io/nfd-rdt-RDTMON = true
2018/05/24 14:18:24 node.alpha.kubernetes-incubator.io/nfd-rdt-RDTCMT = true
2018/05/24 14:18:24 node.alpha.kubernetes-incubator.io/nfd-rdt-RDTMBM = true
2018/05/24 14:18:24 node.alpha.kubernetes-incubator.io/nfd-rdt-RDTL3CA = true
2018/05/24 14:18:24 node.alpha.kubernetes-incubator.io/nfd-rdt-RDTMBA = true
2018/05/24 14:18:24 node.alpha.kubernetes-incubator.io/nfd-pstate-turbo = true
2018/05/24 14:18:24 node.alpha.kubernetes-incubator.io/nfd-memory-numa = true
E0524 14:18:24.276432       1 network.go:48] SR-IOV not supported for network interface: eth0: open /sys/class/net/eth0/device/sriov_totalvfs: no such file or directory
2018/05/24 14:18:24 discovery failed for source [selinux]: Failed to detect the status of selinux, please check if the system supports selinux and make sure /sys on the host is mounted into the container: open /host-sys/fs/selinux/enforce: no such file or directory
2018/05/24 14:18:24 continuing ...

Looks good, let's merge this

[poussa]

+1