another attempt at pause/unpause

exercise.sh

@@ -130,9 +130,9 @@ fi
 # pause the VM and verify we can't ping it anymore
 nova pause $NAME
 
-sleep 1
+sleep 2
 
-if ( ping -c1 -w1 $FLOATING_IP ); then
+if ( ping -c1 -w1 $IP); then
     echo "Pause failure - ping shouldn't work"
     exit 1
 fi
@@ -140,9 +140,9 @@ fi
 # unpause the VM and verify we can ping it again
 nova unpause $NAME
 
-sleep 1
+sleep 2
 
-ping -c1 -w1 $FLOATING_IP
+ping -c1 -w1 $IP
 
 # dis-allow icmp traffic (ping)
 nova secgroup-delete-rule $SECGROUP icmp -1 -1 0.0.0.0/0