Change EventLog Id to match odata.id

Could not find a hard rule to require the Id to match the last segment
of the URL/@odata.id but all Redfish mockups match this way, other bmcweb
resources do as well, and redfishtool is easier to use if this is true.

Before:
$ python redfishtool.py -r xxxxxx -u xxxx -p xxxxxxx -S Always \
Systems Logs -i EventLog
5 Transport:getPathBy2:Match: failed match: matchProp=Id, matchValue=EventLog, readValue=Event Log

Tested:
Validator passed.

 curl -k https://${bmc}/redfish/v1/Systems/system/LogServices/EventLog
{
  "@odata.id": "/redfish/v1/Systems/system/LogServices/EventLog",
  "@odata.type": "#LogService.v1_1_0.LogService",
  "Actions": {
    "#LogService.ClearLog": {
      "target": "/redfish/v1/Systems/system/LogServices/EventLog/Actions/LogService.ClearLog"
    }
  },
  "Description": "System Event Log Service",
  "Entries": {
    "@odata.id": "/redfish/v1/Systems/system/LogServices/EventLog/Entries"
  },
  "Id": "EventLog",
  "Name": "Event Log Service",
  "OverWritePolicy": "WrapsWhenFull"

Change-Id: Ia324bebfcae65a195adbb3a4126100d82efde383
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/redfish-core/lib/log_services.hpp b/redfish-core/lib/log_services.hpp
index b22382b..4d4a360 100644
--- a/redfish-core/lib/log_services.hpp
+++ b/redfish-core/lib/log_services.hpp
@@ -570,7 +570,7 @@
             "#LogService.v1_1_0.LogService";
         asyncResp->res.jsonValue["Name"] = "Event Log Service";
         asyncResp->res.jsonValue["Description"] = "System Event Log Service";
-        asyncResp->res.jsonValue["Id"] = "Event Log";
+        asyncResp->res.jsonValue["Id"] = "EventLog";
         asyncResp->res.jsonValue["OverWritePolicy"] = "WrapsWhenFull";
         asyncResp->res.jsonValue["Entries"] = {
             {"@odata.id",