[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/openonu-go-adapter/Voltha_ONUMibAudit.robot b/tests/openonu-go-adapter/Voltha_ONUMibAudit.robot
index 1554236..136c155 100755
--- a/tests/openonu-go-adapter/Voltha_ONUMibAudit.robot
+++ b/tests/openonu-go-adapter/Voltha_ONUMibAudit.robot
@@ -193,4 +193,4 @@
     ${seconds}=    Convert To String    ${seconds}
     ${seconds}=    Get Substring    ${seconds}    0    -2
     ${seconds}=    Set Variable If    ${unit}    ${seconds}s    ${seconds}
-    [return]    ${seconds}
+    RETURN    ${seconds}