log_services: Initialize Members@odata.count as 0

Currently when Members array is initialized to an empty array, the
Members@odata.count is not present. Initialize it as 0.

The bug seems to have been introduced by:
https://gerrit.openbmc-project.xyz/50224

Tested: On QEMU -
Before change:
{
  "@odata.id": "/redfish/v1/Systems/system/LogServices/Crashdump/Entries",
  "@odata.type": "#LogEntryCollection.LogEntryCollection",
  "Description": "Collection of Crashdump Entries",
  "Members": [],
  "Name": "Open BMC Crashdump Entries"
}

After change:
{
  "@odata.id": "/redfish/v1/Systems/system/LogServices/Crashdump/Entries",
  "@odata.type": "#LogEntryCollection.LogEntryCollection",
  "Description": "Collection of Crashdump Entries",
  "Members": [],
  "Members@odata.count": 0,
  "Name": "Open BMC Crashdump Entries"
}
{
  "@odata.id": "/redfish/v1/Systems/system/LogServices/Crashdump/Entries",
  "@odata.type": "#LogEntryCollection.LogEntryCollection",
  "Description": "Collection of Crashdump Entries",
  "Members": [
    {
      "@odata.id": "/redfish/v1/Systems/system/LogServices/Crashdump/Entries/OnDemand",
      "@odata.type": "#LogEntry.v1_7_0.LogEntry",
      "AdditionalDataURI": "/redfish/v1/Systems/system/LogServices/Crashdump/Entries/OnDemand/crashdump_ondemand_1970-01-01T00:05:23Z.json",
      "Created": "1970-01-01T00:05:23Z",
      "DiagnosticDataType": "OEM",
      "EntryType": "Oem",
      "Id": "OnDemand",
      "Name": "CPU Crashdump",
      "OEMDiagnosticDataType": "PECICrashdump"
    }
  ],
  "Members@odata.count": 1,
  "Name": "Open BMC Crashdump Entries"
}

Signed-off-by: Brandon Kim <brandonkim@google.com>
Change-Id: I5d17a8a62db23ad0da1c97113a4c6521bdec02cb
diff --git a/redfish-core/lib/log_services.hpp b/redfish-core/lib/log_services.hpp
index 4b48873..08765f2 100644
--- a/redfish-core/lib/log_services.hpp
+++ b/redfish-core/lib/log_services.hpp
@@ -2723,6 +2723,7 @@
                         "Collection of Crashdump Entries";
                     asyncResp->res.jsonValue["Members"] =
                         nlohmann::json::array();
+                    asyncResp->res.jsonValue["Members@odata.count"] = 0;
 
                     for (const std::string& path : resp)
                     {