Draft: feat: collect all cmdline files for each qemu-kvm processes

[chenlizhong]

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Complete Description of Additions/Changes:

To collect the cmdline files for each qemu-kvm processes.
The example data is as below:

/usr/libexec/qemu-kvm-namejiajun-vm-1_jiajun-db2-test-S-machinepc-i440fx-rhel7.0.0,accel=kvm,usb=off,dump-guest-core=off-cpuIvyBridge,+ds,+acpi,+ss,+ht,+tm,+pbe,+dtes64,+monitor,+ds_cpl,+vmx,+smx,+est,+tm2,+xtpr,+pdcm,+pcid,+dca,+osxsave,+arat,+xsaveopt,+pdpe1gb-m24000-realtimemlock=off-smp8,sockets=8,cores=1,threads=1-uuidaa742374-099c-4db4-bbc9-a7768bbb2a3e-no-user-config-nodefaults-chardevsocket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-1294-jiajun-vm-1_jiajun-d/monitor.sock,server,nowait-monchardev=charmonitor,id=monitor,mode=control-rtcbase=utc-no-shutdown-bootstrict=on-devicepiix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2-drivefile=/var/lib/libvirt/images/jiajun-vm-1_jiajun-db2-test.img,format=qcow2,if=none,id=drive-ua-box-volume-0-devicevirtio-blk-pci,scsi=off,bus=pci.0,addr=0x3,drive=drive-ua-box-volume-0,id=ua-box-volume-0,bootindex=1-netdevtap,fd=47,id=hostua-net-0,vhost=on,vhostfd=51-devicevirtio-net-pci,netdev=hostua-net-0,id=ua-net-0,mac=52:54:00:fc:b1:cb,bus=pci.0,addr=0x5-chardevpty,id=charserial0-deviceisa-serial,chardev=charserial0,id=serial0-vnc127.0.0.1:5-ken-us-vgacirrus-devicevirt

[xiangce]

@chenlizhong - Please use an issue in the insights-core-assets or a RHINENG Jira card with component = Insights Specs to get it approved before adding the new specs.