Make UTC to local TimestampValue conversion faster
Make UTC to local TimestampValue conversion faster

By removing a few of function calls the conversion time is reduced by
~50%.

Change-Id: Ibb18a0c646bf0a901fb5de8211a446b60634c6b0
Reviewed-on: http://gerrit.cloudera.org:8080/59
Reviewed-by: Casey Ching <77bc9a9984e6786c5799d7a71768cf023120ef76@cloudera.com>
Tested-by: Internal Jenkins

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