Robot coding guideline fixes

Changes:
    - Fix line char 110 exceeding.

Change-Id: I45fcc995dfee29173cf038f63699ef634507e9a6
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/service_root/test_service_root.robot b/redfish/service_root/test_service_root.robot
index a4b8ddb..837c3e9 100644
--- a/redfish/service_root/test_service_root.robot
+++ b/redfish/service_root/test_service_root.robot
@@ -113,7 +113,7 @@
     ${content}=  To JSON  ${resp.content}
     ${headers}=  Create Dictionary   Content-Type=application/json
     ...  X-Auth-Token=${resp.headers["X-Auth-Token"]}
-    ${resp}=  Delete Request  openbmc  /redfish/v1/SessionService/Sessions/${content["Id"]}  headers=${headers}
+    ${resp}=  Delete Request  openbmc  ${REDFISH_SESSION}${/}${content["Id"]}  headers=${headers}
     Should Be Equal As Strings  ${resp.status_code}  ${HTTP_OK}