Mem leakage and test update for valgrind

test/test_identity.sh

@@ -180,8 +180,8 @@ new "cli validate"
 expectfn "$clixon_cli -1 -f $cfg -y $fyang -l o validate" 0 "^$"
 
 new "Kill backend"
-# Check if still alive
-pid=`pgrep clixon_backend`
+# Check if premature kill
+pid=`pgrep -u root -f clixon_backend`
 if [ -z "$pid" ]; then
     err "backend already dead"
 fi