[VOL-5584] Replace deprecated [Return] settings with RETURN across repository

Change-Id: Ia0231ed837c4407440fe93c6bf36c7a55edb7bea
Signed-off-by: Serkant Uluderya <serkant.uluderya@netsia.com>
diff --git a/tests/functional/K8S_SystemTest.robot b/tests/functional/K8S_SystemTest.robot
index dc5361d..e153e0f 100644
--- a/tests/functional/K8S_SystemTest.robot
+++ b/tests/functional/K8S_SystemTest.robot
@@ -99,7 +99,7 @@
     ${rc}    ${size}=    Run and Return Rc and Output
     ...    kubectl -n ${namespace} get ${ETCD_resources} ${ETCD_name} -o jsonpath='{.status.replicas}'
     Should Be Equal As Integers    ${rc}    0   Could not get ETCD replica count
-    [Return]    ${size}
+    RETURN    ${size}
 
 Scale ETCD
     [Arguments]    ${namespace}    ${size}