Support Parquet fileformat for data-generator when running against Hive
Support Parquet fileformat for data-generator when running against Hive

Also add DDL logging to facilitate debugging.

Change-Id: If7600677ed8c491b68468cae4ddf5394499576ca
Reviewed-on: http://gerrit.cloudera.org:8080/688
Reviewed-by: Casey Ching <77bc9a9984e6786c5799d7a71768cf023120ef76@cloudera.com>
Tested-by: Internal Jenkins

bratatidas9/Impala-1,tempbottle/Impala,lirui-intel/Impala,lnliuxing/Impala,lirui-intel/Impala,kapilrastogi/Impala,bratatidas9/Impala-1,lirui-intel/Impala,caseyching/Impala,lnliuxing/Impala,caseyching/Impala,theyaa/Impala,brightchen/Impala,tempbottle/Impala,bratatidas9/Impala-1,bowlofstew/Impala,rdblue/Impala,rdblue/Impala,tempbottle/Impala,bratatidas9/Impala-1,cchanning/Impala,rdblue/Impala,kapilrastogi/Impala,kapilrastogi/Impala,theyaa/Impala,bowlofstew/Impala,rdblue/Impala,XiaominZhang/Impala,brightchen/Impala,kapilrastogi/Impala,cchanning/Impala,cchanning/Impala,caseyching/Impala,kapilrastogi/Impala,lnliuxing/Impala,tempbottle/Impala,XiaominZhang/Impala,lnliuxing/Impala,cchanning/Impala,tempbottle/Impala,brightchen/Impala,bowlofstew/Impala,cchanning/Impala,bowlofstew/Impala,lirui-intel/Impala,kapilrastogi/Impala,lirui-intel/Impala,theyaa/Impala,lnliuxing/Impala,lnliuxing/Impala,kapilrastogi/Impala,caseyching/Impala,bowlofstew/Impala,XiaominZhang/Impala,theyaa/Impala,XiaominZhang/Impala,XiaominZhang/Impala,lirui-intel/Impala,XiaominZhang/Impala,caseyching/Impala,brightchen/Impala,tempbottle/Impala,lirui-intel/Impala,brightchen/Impala,bratatidas9/Impala-1,bowlofstew/Impala,tempbottle/Impala,rdblue/Impala,cchanning/Impala,theyaa/Impala,caseyching/Impala,cchanning/Impala,bratatidas9/Impala-1,bratatidas9/Impala-1,theyaa/Impala,lnliuxing/Impala,rdblue/Impala,rdblue/Impala,theyaa/Impala,XiaominZhang/Impala,bowlofstew/Impala,brightchen/Impala,caseyching/Impala,brightchen/Impala