kubeadm: fix the err msg if the token format is not match
kubeadm: fix the err msg if the token format is not match

Previously, the err msg will repeat the token ID of the form "[a-z0-9]{6}"
if the token doesn't match with the desired format.

Signed-off-by: Dave Chen <3fbbe9d8910afe5176d6dd2fc1de9e5729a30247@arm.com>

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