Remove use of deprecated rprint functions

For each of the rprint functions, there is a corresponding gen_print function
that can be used instead.

Change-Id: I89c6e0b63cac7aee92da7dc7945e413001287967
Signed-off-by: Michael Walsh <micwalsh@us.ibm.com>
diff --git a/systest/network_stability_test.robot b/systest/network_stability_test.robot
index 5194a71..bf1dfdd 100755
--- a/systest/network_stability_test.robot
+++ b/systest/network_stability_test.robot
@@ -54,7 +54,7 @@
 
     Shutdown HTX Exerciser
 
-    Rprint Timen  HTX Test ran for: ${HTX_DURATION}
+    Print Timen  HTX Test ran for: ${HTX_DURATION}
 
 
 Start Network Test