[CDH5] Update grant/revoke tests to drop any roles granted to current user before running
[CDH5] Update grant/revoke tests to drop any roles granted to current user before running

Change-Id: Iba03654f56144cb849267520b82a951a29f0dfb2
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/4324
Reviewed-by: Lenni Kuff <724b7df200764f5dc1b723c05ee6c6adabd11bb1@cloudera.com>
Tested-by: jenkins

cgvarela/Impala,scalingdata/Impala,henryr/Impala,caseyching/Impala,cchanning/Impala,tempbottle/Impala,kapilrastogi/Impala,tempbottle/Impala,cchanning/Impala,kapilrastogi/Impala,cgvarela/Impala,placrosse/ImpalaToGo,lnliuxing/Impala,lirui-intel/Impala,ibmsoe/ImpalaPPC,rdblue/Impala,placrosse/ImpalaToGo,grundprinzip/Impala,ibmsoe/ImpalaPPC,theyaa/Impala,cloudera/recordservice,henryr/Impala,lnliuxing/Impala,cloudera/recordservice,gerashegalov/Impala,bratatidas9/Impala-1,tempbottle/Impala,kapilrastogi/Impala,bratatidas9/Impala-1,henryr/Impala,cloudera/recordservice,ibmsoe/ImpalaPPC,henryr/Impala,ImpalaToGo/ImpalaToGo,ibmsoe/ImpalaPPC,grundprinzip/Impala,rdblue/Impala,theyaa/Impala,lnliuxing/Impala,placrosse/ImpalaToGo,cloudera/recordservice,rdblue/Impala,placrosse/ImpalaToGo,theyaa/Impala,brightchen/Impala,placrosse/ImpalaToGo,cchanning/Impala,theyaa/Impala,scalingdata/Impala,brightchen/Impala,tempbottle/Impala,bowlofstew/Impala,cloudera/recordservice,lnliuxing/Impala,ImpalaToGo/ImpalaToGo,ImpalaToGo/ImpalaToGo,theyaa/Impala,tempbottle/Impala,cchanning/Impala,bowlofstew/Impala,caseyching/Impala,lirui-intel/Impala,kapilrastogi/Impala,grundprinzip/Impala,brightchen/Impala,caseyching/Impala,bratatidas9/Impala-1,tempbottle/Impala,bowlofstew/Impala,scalingdata/Impala,cchanning/Impala,cgvarela/Impala,bratatidas9/Impala-1,lirui-intel/Impala,cgvarela/Impala,caseyching/Impala,bowlofstew/Impala,XiaominZhang/Impala,caseyching/Impala,bowlofstew/Impala,ibmsoe/ImpalaPPC,scalingdata/Impala,gerashegalov/Impala,cgvarela/Impala,henryr/Impala,cloudera/recordservice,kapilrastogi/Impala,cgvarela/Impala,lirui-intel/Impala,gerashegalov/Impala,brightchen/Impala,caseyching/Impala,lirui-intel/Impala,grundprinzip/Impala,bratatidas9/Impala-1,ImpalaToGo/ImpalaToGo,lnliuxing/Impala,cchanning/Impala,XiaominZhang/Impala,brightchen/Impala,brightchen/Impala,bratatidas9/Impala-1,tempbottle/Impala,XiaominZhang/Impala,lnliuxing/Impala,kapilrastogi/Impala,cchanning/Impala,gerashegalov/Impala,theyaa/Impala,gerashegalov/Impala,rdblue/Impala,rdblue/Impala,bowlofstew/Impala,rdblue/Impala,XiaominZhang/Impala,lirui-intel/Impala,XiaominZhang/Impala,placrosse/ImpalaToGo,gerashegalov/Impala,kapilrastogi/Impala,gerashegalov/Impala,ibmsoe/ImpalaPPC,cloudera/recordservice,lnliuxing/Impala,XiaominZhang/Impala,ibmsoe/ImpalaPPC,cgvarela/Impala,scalingdata/Impala,bowlofstew/Impala,ImpalaToGo/ImpalaToGo,caseyching/Impala,lirui-intel/Impala,grundprinzip/Impala,brightchen/Impala,XiaominZhang/Impala,rdblue/Impala,bratatidas9/Impala-1,grundprinzip/Impala,theyaa/Impala,scalingdata/Impala,henryr/Impala,ImpalaToGo/ImpalaToGo