Capitalized "[Return]" to adhere to code standards.

Capitalized "[Return]" in places it wasn't.
This commit is style changes only.

Change-Id: I218c87c136ead38af3e310aa2711efaa00df2ca4
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/tests/test_esel.robot b/tests/test_esel.robot
index 16d284a..739d37c 100644
--- a/tests/test_esel.robot
+++ b/tests/test_esel.robot
@@ -50,16 +50,16 @@
 Run IPMI Command Returned
     [Arguments]    ${args}
     ${output_1}=    Execute Command    /tmp/ipmitool -I dbus raw ${args}
-    [return]    ${output_1}
+    [Return]    ${output_1}
 
 Check IPMI Oempartialadd Reject
     [Arguments]    ${args}
     ${stdout}    ${stderr}    ${output_2}=  Execute Command    /tmp/ipmitool -I dbus raw ${args}    return_stdout=True    return_stderr= True    return_rc=True
-    [return]    ${stderr}
+    [Return]    ${stderr}
 
 Check IPMI Oempartialadd Accept
     [Arguments]    ${args}
     ${stdout}    ${stderr}    ${output_3}=    Execute Command    /tmp/ipmitool -I dbus raw ${args}    return_stdout=True    return_stderr= True    return_rc=True
     Should Be Equal    ${output_3}    ${0}    msg=${stderr}
-    [return]    ${stderr}
+    [Return]    ${stderr}