Fix stuck when executing a background command via SSH is SA02

After upgrading the image to Ubuntu 20 in hackfest_basic_metrics_vnf
the SA02 test started to fail: the "Execute Command" keyword from
SSHLibrary hangs when running a "yes" command in backgroud in the VDU
and test never ends. It seems that the SSH library does not handle
the execution of background (run using '&') processes well.

Change-Id: I66aed317ae12cb117ddd1a3cdec3396185dfdbe1
Signed-off-by: aguilard <e.dah.tid@telefonica.com>

diff --git a/robot-systest/testsuite/sa_02-vnf_with_vim_metrics_and_autoscaling.robot b/robot-systest/testsuite/sa_02-vnf_with_vim_metrics_and_autoscaling.robot
index e769f55..e03edba 100644 (file)
--- a/robot-systest/testsuite/sa_02-vnf_with_vim_metrics_and_autoscaling.robot
+++ b/robot-systest/testsuite/sa_02-vnf_with_vim_metrics_and_autoscaling.robot
@@ -97,7 +97,7 @@ Get VNF VIM-based Metric Before Auto-scaling
 Increase VIM-based Metric To Force Auto-scaling
 
     Variable Should Exist  ${privatekey}  msg=SSH private key not available
-    Execute Remote Command Check Rc Return Output   ${vnf_ip_addr}   ${username}   ${password}   ${privatekey}   for i in {1..9}; do yes > /dev/null & done
+    Execute Remote Command Check Rc Return Output   ${vnf_ip_addr}   ${username}   ${password}   ${privatekey}   for i in {1..9}; do yes &> /dev/null & done
 
 
 Wait VIM-based Metric To Exceed Threshold