Convert func_odbc to use SQLExecDirect for speed

(closes issue #10723)
 Reported by: mnicholson
 Patches: 
       func-odbc-direct-execute1.diff uploaded by mnicholson (license 96)
 Tested by: Corydon76, mnicholson, falves11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@99018 65c4cc65-6c06-0410-ace0-fbb531ad65f3