Fix failure return code when deleting VNFD fails

Change-Id: I8ad00b2ae34248dd2649d0fbc66f9af3b004eea4
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/robot-systest/lib/vnfd_lib.robot b/robot-systest/lib/vnfd_lib.robot
index 1d57598..f1cc95e 100644
--- a/robot-systest/lib/vnfd_lib.robot
+++ b/robot-systest/lib/vnfd_lib.robot
@@ -28,7 +28,7 @@
 
 *** Variables ***
 ${success_return_code}   0
-${failure_return_code}   0
+${failure_return_code}   1
 ${delete_max_wait_time}   1min
 ${delete_pol_time}   15sec
 
@@ -118,7 +118,7 @@
     ${rc}   ${stdout}=   Run and Return RC and Output   osm vnfpkg-delete ${vnfd_id}
     log   ${stdout}
     Should Be Equal As Integers   ${rc}   ${failure_return_code}
-    Should Contain  ${stdout}  409  msg=Expected Conflict  values=False
+    Should Contain   ${stdout}   409   msg=Expected Conflict   values=False
     WAIT UNTIL KEYWORD SUCCEEDS   ${delete_max_wait_time}   ${delete_pol_time}   Check For VNFD   ${vnfd_id}   True