Fix for issue 813 - enabling prefix btree search with non-matching predicates

Change-Id: I59eb43afa7dbcabd7f43269566d75c9361c55386
Reviewed-on: http://fulliautomatix.ics.uci.edu:8443/171
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: abdullah alamoudi <bamousaa@gmail.com>
diff --git a/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-secondary-46.aql b/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-secondary-46.aql
index f486e44..48e6112 100644
--- a/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-secondary-46.aql
+++ b/asterix-app/src/test/resources/optimizerts/queries/btree-index/btree-secondary-46.aql
@@ -23,5 +23,5 @@
 create index sec_Idx on testdst(fname,lname);
 
 for $emp in dataset('testdst') 
-where $emp.fname >= "Craig" and $emp.lname >= "Kevin" and $emp.fname <= "Mary" and $emp.lname <= "Tomes"
+where $emp.fname >= "Michael" and $emp.lname <= "Xu"
 return $emp