Change logging level of thrift plan in plan fragment executor.
Change logging level of thrift plan in plan fragment executor.

VLOG(3) includes each row which is much less often useful than the serialized
plan.

Change-Id: I933188f046dafb51da9d06583697792113a9165a
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3289
Reviewed-by: Marcel Kornacker <44592b4eea36663c86b994bb0ea99d15309c1c7d@cloudera.com>
Tested-by: jenkins

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