GH-5350: Add global setting for specifying the locale of the database.

Author: David Ellingsworth

src/NHibernate/Cfg/Environment.cs

@@ -92,6 +92,8 @@ public static string Version
 		/// <summary> A default database catalog name to use for unqualified tablenames</summary>
 		public const string DefaultCatalog = "default_catalog";
 
+		public const string Locale = "locale";
+
 		// Since v5
 		[Obsolete("DefaultEntityMode is deprecated.")]
 		public const string DefaultEntityMode = "default_entity_mode";

src/NHibernate/Cfg/Settings.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Data;
+using System.Globalization;
 using System.Linq.Expressions;
 using NHibernate.AdoNet;
 using NHibernate.AdoNet.Util;
@@ -228,5 +229,6 @@ internal string GetFullCacheRegionName(string name)
 		public BatchFetchStyle BatchFetchStyle { get; internal set; }
 		public BatchingEntityLoaderBuilder  BatchingEntityLoaderBuilder { get; internal set; }
 		public BatchingCollectionInitializerBuilder BatchingCollectionInitializationBuilder { get; internal set; }
+		public CultureInfo Locale { get; internal set; }
 	}
 }

src/NHibernate/Cfg/SettingsFactory.cs

@@ -2,6 +2,7 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.Data;
+using System.Globalization;
 using NHibernate.AdoNet;
 using NHibernate.AdoNet.Util;
 using NHibernate.Cache;
@@ -354,6 +355,9 @@ public Settings BuildSettings(IDictionary<string, string> properties)
 			settings.BatchFetchStyle = PropertiesHelper.GetEnum(Environment.BatchFetchStyle, properties, BatchFetchStyle.Legacy);
 			settings.BatchingEntityLoaderBuilder = GetBatchingEntityLoaderBuilder(settings.BatchFetchStyle);
 			settings.BatchingCollectionInitializationBuilder = GetBatchingCollectionInitializationBuilder(settings.BatchFetchStyle);
+			
+			string locale = PropertiesHelper.GetString(Environment.Locale, properties, CultureInfo.InvariantCulture.Name);
+			settings.Locale = CultureInfo.GetCultureInfo(locale);
 
 			return settings;
 		}