Ensure that the secuirty identifier we get from MorningStar is Valid.

MarketData/MarketDataLib/Helper/MarketDataHelper.cs

@@ -2664,6 +2664,7 @@ namespace MarketData.Helper
       if(null==securityIdentifier )return null;
       securityIdentifier=securityIdentifier.Trim();
       if(securityIdentifier.Equals(","))return null;
+      if (securityIdentifier.Length > 25) return null;  // As a finakl check ... 25 is the maximum length of the security identifer in the database. 
       MDTrace.WriteLine(LogLevel.DEBUG,$"Adding Morningtstar securityIdentifier.  Symbol:{symbol} SecurityIdentifier:{securityIdentifier}");
       MStarSecurityDA.PutSecurityId(symbol,securityIdentifier);
       return securityIdentifier;