e2e storage: add logging to proxy
e2e storage: add logging to proxy

This is optional and can be used to capture the result of command execution in
the log output.

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