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_eventlog.robot b/tests/test_eventlog.robot
index 89f7d04..60083e0 100644
--- a/tests/test_eventlog.robot
+++ b/tests/test_eventlog.robot
@@ -228,4 +228,4 @@
     ${json}=   to json         ${resp.content}
     ${LOGID}=    convert to integer    ${json['data']}
     ${uri}=     catenate    SEPARATOR=   ${EVENT_RECORD}   ${LOGID}
-    [return]  ${uri}
+    [Return]  ${uri}