HADOOP-11922: Fix Dr. Elephant search by heuristic field
HADOOP-11922: Fix Dr. Elephant search by heuristic field

qubole/dr-elephant,qubole/dr-elephant,bretlowery/dr-elephant-mapr,snithish/dr-elephant,snithish/dr-elephant,bretlowery/dr-elephant-mapr,nntnag17/dr-elephant-1,snithish/dr-elephant,snithish/dr-elephant,qubole/dr-elephant,nntnag17/dr-elephant-1,shankar37/dr-elephant,bretlowery/dr-elephant-mapr,nntnag17/dr-elephant-1,shankar37/dr-elephant,shankar37/dr-elephant,shankar37/dr-elephant,nntnag17/dr-elephant-1,qubole/dr-elephant,bretlowery/dr-elephant-mapr