[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_ONUTemplateTests.robot b/tests/openonu-go-adapter/Voltha_ONUTemplateTests.robot
index 20bdec2..5e4dcdf 100755
--- a/tests/openonu-go-adapter/Voltha_ONUTemplateTests.robot
+++ b/tests/openonu-go-adapter/Voltha_ONUTemplateTests.robot
@@ -363,7 +363,7 @@
     ${timeCurrent} =    Get Current Date
     ${timeTotalMs} =    Subtract Date From Date    ${timeCurrent}    ${startTime}    result_format=number
     Log    ONU ${src['onu']}: reached the state ${onu_state} after ${timeTotalMs} sec.    console=yes
-    [Return]    ${timeTotalMs}
+    RETURN    ${timeTotalMs}
 
 Bring Up ONU
     [Documentation]    This keyword brings up onu