e2e storage: add CreateFile to pod IO operations
e2e storage: add CreateFile to pod IO operations

This complements the other operations and will be used by some
future tests.

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