fixed logic error. newnode=>hostname in variable names

CICD/tests/mpi/run_single_node.sh

@@ -42,7 +42,7 @@ while true; do
     #echo "Parameter is $1"
     case "$1" in
      -n|--newnode) # Specify p value.
-       newnode=$2 
+       hostname=$2 
        shift 2
        #echo "Newnode is $newnode"
       ;;
@@ -80,11 +80,11 @@ echo "PID is $$"
 #parse arguments
 parseARG $0 "$@"
 
-echo "newnode=$newnode"
+echo "hostname=$hostname"
 echo "reservation=$reservation"
 echo "partition=$partition"
 
-if [ -z $newnode ] 
+if [ -z $hostname ] 
 then
     echo "You need to specify a nodename "
     printUsage