e2e: node: add tests for cpumanager metrics
e2e: node: add tests for cpumanager metrics

Add tests to verify the cpumanager metrics are populated.

Signed-off-by: Francesco Romani <c7100b580e6017ef67482ace46578cdd2d2e0dfe@redhat.com>

matthyx/kubernetes,jackfrancis/kubernetes,deads2k/kubernetes,gnufied/kubernetes,liggitt/kubernetes,GulajavaMinistudio/kubernetes,liggitt/kubernetes,kevin-wangzefeng/kubernetes,k82cn/kubernetes,MikeSpreitzer/kubernetes,matthyx/kubernetes,jackfrancis/kubernetes,dims/kubernetes,mosoft521/kubernetes,deads2k/kubernetes,ping035627/kubernetes,mahak/kubernetes,matthyx/kubernetes,soltysh/kubernetes,dims/kubernetes,thockin/kubernetes,soltysh/kubernetes,soltysh/kubernetes,GulajavaMinistudio/kubernetes,PiotrProkop/kubernetes,jsafrane/kubernetes,thockin/kubernetes,jessfraz/kubernetes,jsafrane/kubernetes,jackfrancis/kubernetes,jackfrancis/kubernetes,kevin-wangzefeng/kubernetes,enj/kubernetes,jessfraz/kubernetes,dims/kubernetes,dims/kubernetes,k82cn/kubernetes,MikeSpreitzer/kubernetes,gnufied/kubernetes,warmchang/kubernetes,mosoft521/kubernetes,lojies/kubernetes,GulajavaMinistudio/kubernetes,k82cn/kubernetes,liggitt/kubernetes,k82cn/kubernetes,warmchang/kubernetes,thockin/kubernetes,warmchang/kubernetes,thockin/kubernetes,matthyx/kubernetes,enj/kubernetes,olivierlemasle/kubernetes,dims/kubernetes,thockin/kubernetes,jessfraz/kubernetes,lojies/kubernetes,lojies/kubernetes,GulajavaMinistudio/kubernetes,jessfraz/kubernetes,kubernetes/kubernetes,mosoft521/kubernetes,kevin-wangzefeng/kubernetes,enj/kubernetes,enj/kubernetes,kevin-wangzefeng/kubernetes,mahak/kubernetes,gnufied/kubernetes,soltysh/kubernetes,MikeSpreitzer/kubernetes,warmchang/kubernetes,jackfrancis/kubernetes,jessfraz/kubernetes,PiotrProkop/kubernetes,mosoft521/kubernetes,ping035627/kubernetes,MikeSpreitzer/kubernetes,mahak/kubernetes,lojies/kubernetes,k82cn/kubernetes,deads2k/kubernetes,jsafrane/kubernetes,gnufied/kubernetes,mahak/kubernetes,mahak/kubernetes,jsafrane/kubernetes,kevin-wangzefeng/kubernetes,deads2k/kubernetes,warmchang/kubernetes,kubernetes/kubernetes,mosoft521/kubernetes,olivierlemasle/kubernetes,ping035627/kubernetes,MikeSpreitzer/kubernetes,PiotrProkop/kubernetes,olivierlemasle/kubernetes,kubernetes/kubernetes,ping035627/kubernetes,lojies/kubernetes,olivierlemasle/kubernetes,matthyx/kubernetes,kubernetes/kubernetes,liggitt/kubernetes,soltysh/kubernetes,ping035627/kubernetes,GulajavaMinistudio/kubernetes,PiotrProkop/kubernetes,enj/kubernetes,deads2k/kubernetes,liggitt/kubernetes,kubernetes/kubernetes,jsafrane/kubernetes,PiotrProkop/kubernetes,gnufied/kubernetes,olivierlemasle/kubernetes