Fix bug 2220 to solve sol003_01 test

Change-Id: Ic4376067a8b42e470c09ba0668c545db8ce08e55
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
diff --git a/robot-systest/lib/vnf_lib.robot b/robot-systest/lib/vnf_lib.robot
index 78f971d..b3d4aa7 100644
--- a/robot-systest/lib/vnf_lib.robot
+++ b/robot-systest/lib/vnf_lib.robot
@@ -15,6 +15,13 @@
 
 
 *** Keywords ***
+Get Vnf List
+    ${rc}   ${stdout}=   Run and Return RC and Output   osm vnf-list 2>&1
+    Log   ${stdout}
+    Should Be Equal As Integers   ${rc}   ${success_return_code}
+    [Return]   ${stdout}
+
+
 Get VNF VIM ID
     [Arguments]   ${vnf_id}